Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d0cda30977c69a0…

MALICIOUS

PDF

39.5 KB Created: 2020-08-17 03:38:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 71b132e3e3c0ed63667e691336d35128 SHA-1: 8fa90b31639a050e707cd8862b29ff998a2d9043 SHA-256: 0d0cda30977c69a03e867b2b319142286586d4e63d95f0f6898663f8c459e03b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one identified as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though partially corrupted, contains the malicious URL and several other links hosted on Shopify and other domains, suggesting a link farm or phishing attempt. No scripts were extracted, but the presence of numerous links points to a social engineering or redirection-based attack.

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=cladding+metal+sheet+roofing
    • http://files.godleyband.com/uploads/1/3/1/4/131453998/lizenewuxin_momutipojan.pdf
    • http://files.steelheaders.org/uploads/1/3/1/3/131379894/7010446.pdf
    • http://kirokekuw.franhillpharmacy.com/uploads/1/3/1/0/131070054/c769ba4b9.pdf
    • http://files.cleanlifecolonic.com/uploads/1/3/1/4/131438639/gefanufuridagokasila.pdf
    • http://files.metrovanmoversphotoblog.com/uploads/1/3/1/6/131606953/raxujusolipewaz_jetodonivobu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/2821/8010/files/bookworm_adventures_for_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/9154/2681/files/dijefigen.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/rurevudiwosezumo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7131/5876/files/nesexugavudovojilarajuza.pdf
    • https://cdn.shopify.com/s/files/1/0430/8592/2466/files/mosupelovamogelumoxini.pdf
    • https://cdn.shopify.com/s/files/1/0432/2010/7424/files/48115248934.pdf
    • https://cdn.shopify.com/s/files/1/0438/4620/5602/files/97975376172.pdf
    • https://cdn.shopify.com/s/files/1/0431/4457/7178/files/dapulumo.pdf
    • https://cdn.shopify.com/s/files/1/0428/4229/2391/files/dizedobizuporapomoru.pdf
    • https://cdn.shopify.com/s/files/1/0451/6030/0698/files/how_can_i_be_a_good_english_speaker.pdf
    • https://cdn.shopify.com/s/files/1/0431/2544/0669/files/jazajakufikimot.pdf
    • https://cdn.shopify.com/s/files/1/0431/8976/4245/files/accrual_basis_vs_cash_basis.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_off00005b6d.bin
4dcf9b978d3c17eff2b1cdd03b30024539ede664f72e3c844504e718eacc3ada		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B6D 5228 bytes
font_01_sfnt_off00006d02.bin
8773c1fbe059aeffc5b2002ad4690a9b977d5bd85c150bb7ff6ca45e588eac44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D02 10616 bytes

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