Malicious PDF — malware analysis report

Static analysis result for SHA-256 73c2b7e29896fd21…

MALICIOUS

PDF

53.4 KB Created: 2020-08-18 17:14:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3a8dba02ce7acc264113fbaba2ba1f40 SHA-1: d9017eed37cc3e531fb7724db350b4f478b488fc SHA-256: 73c2b7e29896fd218ca1a094646a6c109986b336bbee8f58ace15a0863133398
194 Risk Score

Malware Insights

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

The PDF document contains a lure related to a school report card, which upon opening, presents links to a redirector service. This redirector, 'ttraff.cc', is known to lead to malicious infrastructure. The document also contains a large number of links to other PDFs hosted on Shopify, likely part of an SEO link farm to improve search engine ranking for malicious content. No scripts were extracted, but the presence of malicious redirectors and the link farm indicates a phishing or content-luring campaign.

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.cc/pify?keyword=homewood+flossmoor+high+school+report+card In PDF document text
    • http://files.pqh.com/uploads/1/3/0/7/130739684/limudo-ranuro-majesakobo.pdfIn PDF document text
    • http://files.daviessurveys.com/uploads/1/3/0/7/130738951/608a06508.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/1/0431/1223/5159/files/20989373238.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/8517/1607/files/absolute_value_inequalities_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6302/4547/files/active_english_book_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7854/1727/files/81101853056.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7496/7965/files/stanford_antibiotics_review.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9720/1576/files/anticoagulants_used_in_blood_bank.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9648/2727/files/lullabies_to_paralyze_torrent.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2502/2621/files/18999380447.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3320/6689/files/4701181022.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3213/3278/files/chennai_express_movie_mp4_for_mobile.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7533/8389/files/49817839063.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3164/9689/files/91482891564.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8145/6023/files/sunilodazobamezutifu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9117 5624 bytes
SHA-256: 40a031977a722c8e453dd47816675ed58266a106c80a2f7318689145c491c47c
font_01_sfnt_off0000a427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA427 10728 bytes
SHA-256: d334f87689eb845b6ce3913cf11cf51e1cc04a0ff7fb5e76758de9054a205d83

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