Malicious PDF — malware analysis report

Static analysis result for SHA-256 08258a05d2b4279d…

MALICIOUS

PDF

54.6 KB Created: 2020-08-17 07:54:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f75574f43bff9bdf72d73b6d98f21b52 SHA-1: 8a0f3234f45ba54e9702f71bf997463ce0520a31 SHA-256: 08258a05d2b4279db98421b41f35977c4d3f7c8c8d85205af72cdc75e4ec0130
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on Shopify, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.cc/pify?keyword=sherlock+netflix+parents+guide', indicating a potential phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=sherlock+netflix+parents+guide
    • http://sedimomow.bajabluediving.com/uploads/1/3/0/7/130774965/1001556.pdf
    • http://files.divingworlddestinations.com/uploads/1/3/2/7/132710797/vikog.pdf
    • http://files.madhatterrestaurantandbakery.com/uploads/1/3/1/8/131871963/girebukaj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/1077/6473/files/antrenmanlarla_matematik_4._gn.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9805/files/bluebook_citation_rule.pdf
    • https://cdn.shopify.com/s/files/1/0430/4614/2114/files/ebbtide_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/5763/5743/files/39321739855.pdf
    • https://cdn.shopify.com/s/files/1/0428/2023/9519/files/best_sites_for_illegal_music_s.pdf
    • https://cdn.shopify.com/s/files/1/0448/1833/3858/files/berserk_of_gluttony_manga.pdf
    • https://cdn.shopify.com/s/files/1/0428/5107/4214/files/vixexerofoxetu.pdf
    • https://cdn.shopify.com/s/files/1/0452/7095/8241/files/free_online_astrology_books.pdf
    • https://cdn.shopify.com/s/files/1/0437/6346/6391/files/bulupudebomometilefejosu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6657/2443/files/winavexakuguxiwawofotujob.pdf
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/favebudix.pdf
    • https://cdn.shopify.com/s/files/1/0437/3836/6113/files/the_beggar_s_opera.pdf
    • https://cdn.shopify.com/s/files/1/0431/1030/1847/files/data_structures_review.pdf
    • https://cdn.shopify.com/s/files/1/0434/6875/0998/files/nizojadusajetabavetibe.pdf
    • https://cdn.shopify.com/s/files/1/0431/7449/4369/files/4297122888.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009588.bin
0b489171df18834286487ffb1a67e7b82d3589827269933a5a8c438ebdee1960		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9588 5652 bytes
font_01_sfnt_off0000a8b0.bin
384def5570cbdab05c51659d5f410a4fa5c79591d99687502244525acd68a72a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8B0 10604 bytes

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