Malicious PDF — malware analysis report

Static analysis result for SHA-256 155db621359d51d1…

MALICIOUS

PDF

41.2 KB Created: 2020-08-04 04:30:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6dff3deaef8c34bc517920df400707ab SHA-1: 60d4c687f6b12ac82b1d88c8a6ab90b76773ec2e SHA-256: 155db621359d51d1ac657c948534ec26695e9e54303113a6b6ca9052031d8cb1
154 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, including one pointing to a known malicious redirector at 'ttraff.com'. The document body and embedded links suggest a lure to download further malicious content, likely disguised as formal documents. The presence of multiple external PDF links, many hosted on Shopify, indicates a link farm strategy to distribute malicious files.

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=sample+of+formal+letter+writing+pdf
    • http://files.royalcottagellc.com/uploads/1/3/0/8/130813111/sedudebew.pdf
    • http://files.pershoredeli.co.uk/uploads/1/3/0/7/130740363/3e32b.pdf
    • http://files.seakayakbelgium.eu/uploads/1/3/1/4/131437385/xitunirovogabiri.pdf
    • http://files.ascendit.org/uploads/1/3/1/4/131437886/jaxavanuveba.pdf
    • http://files.lockmangenetics.com/uploads/1/3/0/7/130775383/nizejab.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/4818/0634/files/nabutagubozunerexofo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8546/3713/files/32104292690.pdf
    • https://cdn.shopify.com/s/files/1/0432/8374/2884/files/nikitojerapilatamulavij.pdf
    • https://cdn.shopify.com/s/files/1/0429/5163/9196/files/2259675809.pdf
    • https://cdn.shopify.com/s/files/1/0437/2122/8442/files/7863512699.pdf
    • https://cdn.shopify.com/s/files/1/0438/3460/5728/files/vunaxilowiwerujekexo.pdf
    • https://cdn.shopify.com/s/files/1/0438/1723/8685/files/3268350132.pdf
    • https://cdn.shopify.com/s/files/1/0437/1880/3605/files/91556077070.pdf
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/96335731607.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/vedatepimazusatir.pdf
    • https://cdn.shopify.com/s/files/1/0429/3902/3526/files/vumefiviji.pdf
    • https://cdn.shopify.com/s/files/1/0432/8049/8841/files/47448150124.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_off000063aa.bin
e7cd87b5fb93fadd67327d5bcdc1a2b4ac894c6c3c05d29098ab041962a7cd41		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63AA 5376 bytes
font_01_sfnt_off000075ef.bin
608cd6113349c3a1a26df0371e3545f0400299df93007add4f8c66cc97f34562		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75EF 9840 bytes

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