Malicious PDF — malware analysis report

Static analysis result for SHA-256 873a6a833865c9a6…

MALICIOUS

PDF

48.3 KB Created: 2020-08-14 20:28:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3f5291ba968dece0abfc2268f09931bb SHA-1: 64dc24a92d3c27be39dc1d333375dd5ab338802b SHA-256: 873a6a833865c9a67e30259e9620cfb6f626ecaa5be53ce794eee6f955f2270c
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a primary redirector URL pointing to a known malicious infrastructure. The document body, though heavily obfuscated, contains text related to an 'Afmc exam 2019 application form' and the redirector URL, suggesting a phishing or scam lure. The presence of numerous PDF links, many hosted on Shopify, indicates a link farm designed to distribute malicious content.

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.com/pify?keyword=afmc+exam+2019+application+form In PDF document text
    • http://files.mayfairreinvestments.com/uploads/1/3/0/9/130969306/d703a98117391.pdfIn PDF document text
    • http://files.phuhlisani.org/uploads/1/3/1/4/131453250/6dadc2.pdfIn PDF document text
    • http://files.killeenalphas.com/uploads/1/3/0/8/130814209/2149560.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/1/0431/2776/7206/files/to_kill_a_mockingbird_aaron_sorkin_script.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8462/8633/files/wolewigawopajivobova.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/3846/2372/files/andragogy_journal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5309/5844/files/29328490925.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6332/9446/files/94958387152.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4979/4213/files/60716067729.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2490/7414/files/princeton_review_gmat_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7314/9859/files/88212565339.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6352/5029/files/pdf_to_eps.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6700/5333/files/bangkok_bus_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3025/7568/files/lugiwodifadaga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zobirunutopuwipigodilig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8226/1415/files/fegiwexud.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_off000067ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67EA 5524 bytes
SHA-256: 89f4dace3016ad15fd50d3add23646efe7da445579b61164e7a108b43f7221f4
font_01_sfnt_off00007a9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A9E 10832 bytes
SHA-256: e3487dec4caa341293b771f7387c99a4fa5358741cee35b346626358505a9006
font_02_sfnt_off00009ebc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EBC 16164 bytes
SHA-256: ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8