Malicious PDF — malware analysis report

Static analysis result for SHA-256 055764e38edef43b…

MALICIOUS

PDF

44.1 KB Created: 2020-08-13 04:17:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ed968114d08cd5215b1744dd977eaeb SHA-1: 33e05f9a3a4d22b4e9ee40e9ed2c3e9f87791ba4 SHA-256: 055764e38edef43b70428657024978473251cc5c9a303f4814c7f3576a7d85cf
162 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely the primary malicious payload delivery mechanism. The presence of a 'download button' lure further supports a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wb?keyword=hartzell%20propeller%20manual%20202a
    • http://files.riverreachestates.ca/uploads/1/3/0/7/130775220/mugatome.pdf
    • http://files.allergicandyummy.com/uploads/1/3/1/4/131453215/4fde3eb.pdf
    • http://tasorod.streetcarartist.com/uploads/1/3/2/7/132712358/2745101.pdf
    • http://files.greenleafcommunityfarms.com/uploads/1/3/2/7/132712315/dufibudi-naper.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/2520/3354/files/96714284555.pdf
    • https://cdn.shopify.com/s/files/1/0435/0866/2440/files/lenugir.pdf
    • https://cdn.shopify.com/s/files/1/0429/8362/0767/files/alpha_amylase_test.pdf
    • https://cdn.shopify.com/s/files/1/0453/6372/4443/files/altura_uterina_y_edad_gestacional.pdf
    • https://cdn.shopify.com/s/files/1/0436/0696/6429/files/sitekamuvutizoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/0863/0681/files/seed_of_life_wow_classic.pdf
    • https://cdn.shopify.com/s/files/1/0432/7899/1520/files/mipepemejilevinek.pdf
    • https://cdn.shopify.com/s/files/1/0429/0704/1958/files/rebepuxaxadufuzobewa.pdf
    • https://cdn.shopify.com/s/files/1/0435/6790/6979/files/nulolemafuru.pdf
    • https://cdn.shopify.com/s/files/1/0429/1536/5020/files/nifuwowagomite.pdf
    • https://cdn.shopify.com/s/files/1/0428/4170/2567/files/jenetunokonojirigujufus.pdf
    • https://cdn.shopify.com/s/files/1/0429/4665/8463/files/isometric_projection_notes.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_off00006f90.bin
3b8094a0a7072e8e35ca44f25e7672d8b4fc150cebd8df06a7e02a3b2b027476		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F90 5072 bytes
font_01_sfnt_off000080bb.bin
b45770b21a69529ff6147a24de36d5a82e212cc48f1c0a8be07d5d14daef8fd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80BB 10228 bytes

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