Malicious PDF — malware analysis report

Static analysis result for SHA-256 6075287e9076dced…

MALICIOUS

PDF

47.8 KB Created: 2020-08-04 10:48:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e79670a979c249d7eac6f4aaef9b9bd SHA-1: a4e505a00bd065c605a79edfca88d8a77dd1863d SHA-256: 6075287e9076dcedae3f2ee61f9eda36eafbbae429a8c9937a65776f61d70494
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high number of external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. This suggests a link farm or SEO poisoning tactic to lure victims to malicious infrastructure. 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.cc/pify?keyword=tipos+de+actuadores+hidraulicos+pdf
    • http://files.boscawenpubliclibrary.org/uploads/1/3/1/6/131606758/debefodotos.pdf
    • http://files.tworiversrecovery.com/uploads/1/3/2/7/132740860/91cf8adff.pdf
    • http://files.creativconcepts.studio/uploads/1/3/1/1/131164455/07f020eb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/4211/1637/files/86447996603.pdf
    • https://cdn.shopify.com/s/files/1/0430/4715/7914/files/rogep.pdf
    • https://cdn.shopify.com/s/files/1/0434/6108/3301/files/mental_health_hotline_ringtones.pdf
    • https://cdn.shopify.com/s/files/1/0432/6660/5211/files/gafamo.pdf
    • https://cdn.shopify.com/s/files/1/0428/2250/0518/files/dagikugetigenagejaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/3387/7914/files/wumorudesifikedipu.pdf
    • https://cdn.shopify.com/s/files/1/0428/0667/3574/files/6132408921.pdf
    • https://cdn.shopify.com/s/files/1/0433/3250/1656/files/lulewo.pdf
    • https://cdn.shopify.com/s/files/1/0438/8149/6744/files/68660554902.pdf
    • https://cdn.shopify.com/s/files/1/0435/5883/0229/files/25170480005.pdf
    • https://cdn.shopify.com/s/files/1/0428/9173/9295/files/62852460853.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000963c.bin
e32574bd2e9ac6c9d42b2e637df812e37f11006cf561c263809df0ee3368f575
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x963C 17524 bytes
font_00_sfnt_off0000622b.bin
34d36cf11d7a8fabd5627e8a2d2e9c237080ad165e9d519e2e0cc71024e8883a
pdf-font-stream PDF embedded font (sfnt) at offset 0x622B 5192 bytes
font_01_sfnt_off000073ce.bin
b5bf7d45295ab4bc0e833bbd79bc487890a76c7c72a3b24be694eacfba4c0e2b
pdf-font-stream PDF embedded font (sfnt) at offset 0x73CE 10492 bytes