Malicious PDF — malware analysis report

Static analysis result for SHA-256 e786a01b4a28d857…

MALICIOUS

PDF

42.1 KB Created: 2020-08-14 21:39:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 19c8c07e67d8c68de7811937a34b6361 SHA-1: 44c9644806b549990fd5533f35ae8dbcc8aab0e7 SHA-256: e786a01b4a28d8578cbe1f844f1f6be999239a63ac6ee826cd0422db6a7f87d6
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One critical heuristic identified a link to a known malicious redirector at https://ttraff.ru/pify. The document body, though heavily obfuscated, contains text related to educational worksheets, likely a lure to encourage clicks on the malicious links. No scripts were extracted from this sample.

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=addition+and+subtraction+worksheets+for+4th+grade In PDF document text
    • http://files.usna99.com/uploads/1/3/1/4/131454316/edfa8.pdfIn PDF document text
    • http://rizujur.treatsicecreamparlour.com/uploads/1/3/0/8/130874277/kabevojuwotukol.pdfIn PDF document text
    • http://lewoxatof.silaepic.com/uploads/1/3/1/0/131069934/bewulanoruruno_logifavet_vixowepurovofu_jejibegizobubag.pdfIn PDF document text
    • http://files.tammykraft.com/uploads/1/3/1/3/131380895/c7ead4a84e07c12.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0441/4137/9736/files/ionic_3_angular_4_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2778/4095/files/no_reply_at_all.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/5568/0410/files/lasoboxagebobepomagiba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/23211294175.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0416/6297/files/bible_quiz_questions_and_answers_from_luke_in_malayalam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4610/9341/files/81701859053.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4323/2661/files/82190962865.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7463/4403/files/sedizuxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6411/4852/files/xozatenagebawew.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 4

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_off0000582a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x582A 5504 bytes
SHA-256: 99ffadf3e90627890bd533e9824b8324eed37fa0612c6fe88d248d31ddd056fe
font_01_sfnt_off00006af2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF2 10100 bytes
SHA-256: a87ed069c3678ec533330752515734d0e03347784e3eea41cf09ea768e8c56b1
font_02_sfnt_off00008d7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D7C 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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