Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cc656a37c4ec66d…

MALICIOUS

PDF

50.0 KB Created: 2020-08-09 03:54:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9aa4c5ea71e452f6ee2ed6a5120356da SHA-1: 8576e75332b89f983ff5e4e79298e08308250412 SHA-256: 6cc656a37c4ec66dca408d9a22d00710aabff82643c2602ae543c4af63e898bc
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to Shopify domains hosting other PDFs, but one critical link directs to a known malicious redirector. The heuristic 'SE_PAYMENT_REDIRECT_LURE' strongly suggests a business-email-compromise pattern, aiming to trick users into believing there are new or changed banking instructions. The presence of embedded URLs and the ML classifier's high confidence further support a malicious intent, likely to facilitate credential harvesting or financial fraud.

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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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=accounts+definition+pdf
    • http://files.kleinspainted.com/uploads/1/3/1/3/131382595/zojozasibulepak.pdf
    • http://files.iyapk.org/uploads/1/3/1/4/131437299/9330408.pdf
    • http://files.iamfreetour.com/uploads/1/3/0/9/130969262/dolokok_bitukujefoxop.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/2703/8369/files/multiple_markers_with_infowindows_google.pdf
    • https://cdn.shopify.com/s/files/1/0435/7190/4673/files/wegene.pdf
    • https://cdn.shopify.com/s/files/1/0431/2625/9876/files/31952229198.pdf
    • https://cdn.shopify.com/s/files/1/0431/4647/7722/files/76880062816.pdf
    • https://cdn.shopify.com/s/files/1/0437/2122/8442/files/luritilalugolake.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2960/files/child_development_9th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0440/3937/2965/files/26742037734.pdf
    • https://cdn.shopify.com/s/files/1/0430/8933/0325/files/mamugapeditokozazuguwir.pdf
    • https://cdn.shopify.com/s/files/1/0431/1980/4567/files/fofegenir.pdf
    • https://cdn.shopify.com/s/files/1/0433/4790/2629/files/kobalejimeg.pdf
    • https://cdn.shopify.com/s/files/1/0438/9657/0024/files/metafisica_aristoteles.pdf
    • https://cdn.shopify.com/s/files/1/0435/8340/6239/files/autoimmune_disease_types.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065d5.bin
5246fbe4dfbef510aed50a79deb634528e958d781b3883124e52db73a057b76b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65D5 4800 bytes
font_01_sfnt_off00007647.bin
b0d8ae5bc85df9ec8b09f9001f116f13cc88515bf999168b5e47c4cb379e8ac3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7647 14800 bytes
font_02_sfnt_off0000a490.bin
ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA490 16164 bytes

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