Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c9f2d6eeadabfbb…

MALICIOUS

PDF

40.7 KB Created: 2020-08-18 15:49:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 003ff35659506e89dc109e3eb3839e6f SHA-1: 253486c50e7cfb728023b00a37529a535afe07a2 SHA-256: 0c9f2d6eeadabfbbe7f3bb5d5f15f4f34b5599f70bd59354a6f146910a0a8edb
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical redirector link pointing to malicious infrastructure, suggesting a phishing or scam attempt. The embedded document body, though partially corrupted, contains the same URL and topic as the redirector link, reinforcing the lure. 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=steward+full+form+in+hotel+industry
    • http://files.ccmooresville.com/uploads/1/3/1/3/131381819/tanupip.pdf
    • http://files.annemudge.com/uploads/1/3/2/6/132681851/d2888af390.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/1623/1840/files/english_articles_exercises_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0440/2062/9654/files/cdf_bursary_form.pdf
    • https://cdn.shopify.com/s/files/1/0435/9972/4702/files/nodurukir.pdf
    • https://cdn.shopify.com/s/files/1/0435/5850/2563/files/54795908745.pdf
    • https://cdn.shopify.com/s/files/1/0440/4844/9686/files/33056292038.pdf
    • https://cdn.shopify.com/s/files/1/0429/5363/8044/files/nizapolejimotu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6377/1293/files/nalajotikiwawuzevumuloda.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/kugobinigedurev.pdf
    • https://cdn.shopify.com/s/files/1/0452/3173/4944/files/manual_de_instalao_forno_eletrico_brastemp_gourmand.pdf
    • https://cdn.shopify.com/s/files/1/0447/7802/9213/files/flavonoids_anticancer.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_off000061b6.bin
8df2b6babcfc113fc289489cbedd49c94d852dfc9fac58db3f5479532f9285cc
pdf-font-stream PDF embedded font (sfnt) at offset 0x61B6 5444 bytes
font_01_sfnt_off0000741c.bin
2900edee4a079cafcbf70c7c2fabad8250233182b486e974be4373a6e6f31b53
pdf-font-stream PDF embedded font (sfnt) at offset 0x741C 9952 bytes