Malicious PDF — malware analysis report

Static analysis result for SHA-256 08fc477e85d58309…

MALICIOUS

PDF

43.7 KB Created: 2020-11-04 02:38:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 61329430c9f9870a3db96f79c7820811 SHA-1: 71743eac2ed902dc6c6e9c5b0241ae672f31ffc8 SHA-256: 08fc477e85d58309447b3aff8428530123715d0342e6c3f8127233768c27f518
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to an SEO redirector infrastructure. The primary malicious link, 'https://ttraff.ru/123?keyword=pokemon+go+app+free+download', is presented as a lure for a free game download, indicating a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to redirect users to malicious content, likely leveraging embedded JavaScript for obfuscation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.ru/123?keyword=pokemon+go+app+free+download In PDF document text
    • https://vurofagulomefu.weebly.com/uploads/1/3/1/4/131452840/wefamamomeg_fapezerelog_rajokamoginena.pdfIn PDF document text
    • https://ziripovopibew.weebly.com/uploads/1/3/0/8/130874468/edc448865487a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408713/normal_5f97dcef281e1.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/1/0501/7016/7486/files/convert_image_into_editable_text.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/9366/2133/files/anyong_lupa_worksheet_for_grade_4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/777acaa9-1b21-4e05-9d84-ff905c7cbaca/sur_le_pont_mirabeau.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6dd77df3-b1a8-4ed2-809f-feaa246311ac/vekolojasagajewa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/237111ff-8467-4362-98ad-d109b9c41ac6/karambit_3d_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73d95546-27a7-4f28-a215-fad07a2da9a1/34957034985.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fd47177-be15-445e-a5f4-b614a375ae99/45268698294.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b45c339-f931-48c1-8bf8-a826df3825df/polimeros_y_materiales_compuestos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b05ee439-aa7b-4f7c-a9e9-a6c41718b0e0/sodosotinisejilor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4226befb-44e0-438d-974a-923078c05f09/gewagote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aade4221-2ff1-41a5-b6c4-35720694e7a0/cc_nt_lnh_sau_nt_lnh_no_thot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93f709d1-0465-4295-bec1-b17ee4f752c0/motorola_astro_p25_radio_system.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C4D 5340 bytes
SHA-256: a2193a0522676cb84f9f4b224c3c725eff2f35fcaa0645075b8f35d32421de77
font_01_sfnt_off00007e7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E7B 10872 bytes
SHA-256: d74ab202280b88297e88489350a695d053b1ddacf409873578f14ed39d6111e7