Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b1c5e0543090133…

MALICIOUS

PDF

37.2 KB Created: 2020-08-01 11:05:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c679e6ac9f529267b3dc55c304d207b SHA-1: df7c421d1801467e7a93326093fde11fc9d239e9 SHA-256: 7b1c5e05430901337ac361bd3d14320b8528d26f4da3065ce283838799975bd7
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 redirector infrastructure. The primary malicious URL identified is https://ttraff.com/pify?keyword=how+to+make+artboard+transparent+in+illustrator, which is known to host malicious content. The document body, though heavily obfuscated, contains references to this URL and other URLs hosted on Shopify and custom domains, suggesting a link farm or redirection scheme designed to lead users to malicious sites. No scripts were extracted, but the PDF structure itself facilitates the 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=how+to+make+artboard+transparent+in+illustrator
    • http://files.littlecoveliving.net/uploads/1/3/0/9/130968912/kenavi.pdf
    • http://files.juliacollar.com/uploads/1/3/2/6/132696465/nizosolabilole_bajapex_makajunafiro.pdf
    • http://files.thejolielife.com/uploads/1/3/1/3/131380345/4824271.pdf
    • http://files.sompbags.com/uploads/1/3/0/7/130740199/8677019.pdf
    • http://files.shansurfny.com/uploads/1/3/1/4/131437493/1c193470.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4757/4943/files/9081226860.pdf
    • https://cdn.shopify.com/s/files/1/0434/4217/6150/files/sozudexonovajubex.pdf
    • https://cdn.shopify.com/s/files/1/0428/5012/3943/files/makukalimunelugawuvusaxeb.pdf
    • https://cdn.shopify.com/s/files/1/0438/2267/8173/files/27250302000.pdf
    • https://cdn.shopify.com/s/files/1/0433/9436/7649/files/gofiluxesotep.pdf
    • https://cdn.shopify.com/s/files/1/0435/5316/1367/files/2937396979.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nisej.pdf
    • https://cdn.shopify.com/s/files/1/0428/5143/4659/files/63010100326.pdf
    • https://cdn.shopify.com/s/files/1/0433/3161/6923/files/venaruturezuwawejavuvo.pdf
    • https://cdn.shopify.com/s/files/1/0438/9001/6424/files/27975509475.pdf
    • https://cdn.shopify.com/s/files/1/0429/1464/4127/files/nulameruso.pdf
    • https://cdn.shopify.com/s/files/1/0430/6062/5562/files/30045162556.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kebiwubinixakagaxirefu.pdf
    • https://cdn.shopify.com/s/files/1/0438/3821/0205/files/jemalejevetolejimesut.pdf
    • https://cdn.shopify.com/s/files/1/0428/7306/1532/files/bunibogadadejejop.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_off00005321.bin
aa040eaadd2f44e56f37fdcdede56da10d0602cc7d5d9c647a2bb5e68e0a3c06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5321 5364 bytes
font_01_sfnt_off00006547.bin
273165083a4b545f719140bd263f4a3b67f3523285b23eaed7edf17f70bc2222		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6547 9976 bytes

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