Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c2f3b858848ee5a…

MALICIOUS

PDF

57.5 KB Created: 2020-08-19 02:11:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1f1853764e201f322e8cc47cfdb4bf2d SHA-1: 4d656d83626f2628fa7a35ab934cfb1025ed3388 SHA-256: 6c2f3b858848ee5af628b0a31310f626e5be3a1386e03f365afa0129d0161339
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to 'Term end report card comments' and embeds numerous links, many of which point to a redirector service. This redirector is associated with known malicious infrastructure and leads to a link farm of other PDFs, suggesting a phishing or scam campaign. The ML classifier strongly indicated maliciousness.

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/pify?keyword=term+end+report+card+comments In PDF document text
    • http://files.elementaryschoolcounseling.org/uploads/1/3/1/3/131379949/1939712.pdfIn PDF document text
    • http://files.nayadaya.com/uploads/1/3/0/7/130739718/2f25a07b8b.pdfIn PDF document text
    • http://files.badhabitkustoms.com/uploads/1/3/2/6/132681295/eb00072e71207f.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/1/0432/0811/4340/files/tapivisobatofutokexapi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0982/6213/files/fojaludatalujifutamowed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3453/2245/files/5001440918.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6811/9448/files/81017920469.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/7162/2559/files/self_certify_sickness.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7281/4245/files/diselizujefidefu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8198/0321/files/vivapirodak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0252/6887/files/regin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6135/4389/files/envision_algebra_2_textbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0456/4857/6679/files/aashiqui_2_songs_all_remix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7035/7661/files/4629757757.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000099e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99E2 2828 bytes
SHA-256: 4aba2bb845853324476be69e5ed1bf4ff35002942389efac2b843cac1129f0e9
font_01_sfnt_off0000a3dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA3DD 5136 bytes
SHA-256: 2c552eb33e33c71b29ee4c903b82dd851baf9b4b01c60d4da2acfeb5c30c7874
font_02_sfnt_off0000b52f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB52F 10420 bytes
SHA-256: c72a9171233075bb830e064e2135f13891a1f283082520e83dc9a56254eef40a

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