Malicious PDF — malware analysis report

Static analysis result for SHA-256 151936b4ece426f2…

MALICIOUS

PDF

44.2 KB Created: 2020-08-24 01:58:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e69212c076281f7f379f3318dc9c10de SHA-1: 273b95492cddd33b8c047bf2f27e4eb15fbe553a SHA-256: 151936b4ece426f29763a6aa7a9bd6cd0483afb66d07292cfcc48f4592df9259
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though obfuscated, contains text related to 'Army equal opportunity training' and the malicious URL, suggesting a lure. The ML classifier strongly indicates maliciousness, and the presence of SEO-optimized links points towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=army+equal+opportunity+training+jko+answers In PDF document text
    • http://puwonavap.showmethesmile.net/uploads/1/3/1/4/131453325/jobonakavit-zinexata-jajano.pdfIn PDF document text
    • http://files.newrichmondwiumc.org/uploads/1/3/0/7/130739153/6245985fd3e85.pdfIn PDF document text
    • http://files.orian.us/uploads/1/3/1/4/131438869/rixanovaxe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3374/7878/files/grignard_synthesis_of_triphenylmethanol_lab_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6660/5211/files/29153511128.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/17844710077.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7709/7886/files/fowewijusujigefok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1568/2717/files/ipa_othman_moviebox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3595/1257/files/telobanedogajelawipujoke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9443/4207/files/adding_and_subtracting_fractions_worksheet_7th_grade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7926/2623/files/zibudupibonal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3128/2335/files/work_permit_application_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4891/9450/files/hot_coffie_gta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6670/3516/files/81240431368.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9725/8136/files/53343253295.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2661/1357/files/aliments_riches_en_protines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7420/8415/files/58391746240.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005821.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5821 5588 bytes
SHA-256: 635690e4d2b2ee4afbb2b55e4d61c095d5455f273b3d6976b2bbbea132eec9c8
font_01_sfnt_off00006b23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B23 10180 bytes
SHA-256: e4b932d44ce5fb2ea4161039f4e76301436883a4610fa5205f4276e19192a357
font_02_sfnt_off00008df4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DF4 16204 bytes
SHA-256: 73bb1f519e29941fc98367ae33a8b679223d41029fbf73fb5c585da9ec8c2502