Malicious PDF — malware analysis report

Static analysis result for SHA-256 063d5cf535f8a5ef…

MALICIOUS

PDF

34.8 KB Created: 2020-08-09 19:21:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 77098c115912899e965b2ded9cb80ba4 SHA-1: 03515a31cb98da79af2658e91ca7002a728ae00c SHA-256: 063d5cf535f8a5ef43943c0d8f42e4426ed123ff6d93738337033a323c0f939e
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure at `https://ttraff.com/pify?keyword=badminton+court+drawing+pdf`. The document body, though heavily obfuscated, contains references to the same URL and other Shopify links, reinforcing the lure. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=badminton+court+drawing+pdf
    • http://files.bluestonegrill.net/uploads/1/3/1/8/131858045/044300b6.pdf
    • http://files.mannyinreallife.com/uploads/1/3/1/0/131069934/penufawodirogijuzik.pdf
    • http://files.donpollo.net/uploads/1/3/0/8/130873708/komugi_suvaj_ledematu_vopum.pdf
    • http://files.wcoastbeads.com/uploads/1/3/1/4/131406780/a086c65f5c34.pdf
    • http://files.exeterforum.org/uploads/1/3/2/6/132682883/vajejisubakubik-jonumalisoneren.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/9001/7430/files/sexaxep.pdf
    • https://cdn.shopify.com/s/files/1/0431/2757/0596/files/41099290630.pdf
    • https://cdn.shopify.com/s/files/1/0428/9409/8598/files/89101577774.pdf
    • https://cdn.shopify.com/s/files/1/0435/5984/6051/files/c_bubble_sort.pdf
    • https://cdn.shopify.com/s/files/1/0433/2417/8600/files/bronconeumonia_en_bovinos.pdf
    • https://cdn.shopify.com/s/files/1/0427/6004/4710/files/majelaxo.pdf
    • https://cdn.shopify.com/s/files/1/0429/2077/1750/files/lowes_cumberland_md.pdf
    • https://cdn.shopify.com/s/files/1/0439/4500/1115/files/dark_souls_2_mad_warrior.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vaxopegi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84574839703.pdf
    • https://cdn.shopify.com/s/files/1/0431/0079/9140/files/tudupefen.pdf
    • https://cdn.shopify.com/s/files/1/0428/8852/8035/files/anthony_robbins_unlimited_power.pdf
    • https://cdn.shopify.com/s/files/1/0429/1058/0899/files/exponential_smoothing_time_series.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_off00004ab2.bin
a44cf0e94ebbd29b8808de90270c7fca6af37ecb4ac4cf4690dd0efb56e76565		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4AB2 5404 bytes
font_01_sfnt_off00005d19.bin
1a8ab643ba1e1512655a39d4de7ae99529e83154f6a925d472beb1ac0fa96222		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D19 9592 bytes

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