Malicious PDF — malware analysis report

Static analysis result for SHA-256 089459329e7e2080…

MALICIOUS

PDF

42.7 KB Created: 2020-08-08 06:28:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3664c3146c0ae66582385e966ac307b7 SHA-1: 20a436ca80ace2c7646a6941b693ece7dce879af SHA-256: 089459329e7e2080bd32557f2fab65334ce48aece30a9a772dfdc1d92dc31a28
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous embedded links, many pointing to Shopify domains, which is indicative of a link farm for SEO manipulation or to disguise malicious content. One critical heuristic identified a link to a known malicious redirector at `https://ttraff.cc/pify?keyword=betahistine+vertigo+pdf`. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same suspicious URL, suggesting an attempt to lure users to malicious infrastructure.

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=betahistine+vertigo+pdf
    • http://files.jackiehagan.org/uploads/1/3/1/4/131437881/9fdb55.pdf
    • http://files.halesforklift.com/uploads/1/3/1/4/131453031/nizokil.pdf
    • http://files.fairtradejoolz.com/uploads/1/3/1/3/131378990/risoguvivoxixep-bevadudejudam-vufumazimapipoz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/0303/4276/files/tegebemujup.pdf
    • https://cdn.shopify.com/s/files/1/0430/0403/5221/files/ginitexiso.pdf
    • https://cdn.shopify.com/s/files/1/0428/5769/3347/files/81772884886.pdf
    • https://cdn.shopify.com/s/files/1/0437/1690/3080/files/6035274771.pdf
    • https://cdn.shopify.com/s/files/1/0435/3707/2280/files/anemia_hemolitica_autoinmune_en_nios.pdf
    • https://cdn.shopify.com/s/files/1/0438/9024/5787/files/61970238643.pdf
    • https://cdn.shopify.com/s/files/1/0430/5672/6170/files/sjogren_syndrome_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0429/0707/4723/files/wakudawabeguxajutaxip.pdf
    • https://cdn.shopify.com/s/files/1/0430/6049/4490/files/68725680163.pdf
    • https://cdn.shopify.com/s/files/1/0429/5272/0543/files/16664771943.pdf
    • https://cdn.shopify.com/s/files/1/0434/2562/8316/files/gelireninumax.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_off00006992.bin
fab5639dd653a4a8871940c831ec4878402fa9aa4281ddadb2f24398aad147d0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6992 5380 bytes
font_01_sfnt_off00007be7.bin
d42af4d02c1a4a342aeea62915be3327515dfcb3a2945f7d9266e22004e76112
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BE7 10380 bytes