Malicious PDF — malware analysis report

Static analysis result for SHA-256 67b3107af2a243b6…

MALICIOUS

PDF

49.9 KB Created: 2020-08-19 06:09:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6d9147c9c41594fb0e36e459e07a7fd SHA-1: cb63dde32ff49a894259a27fb2dd279177adcae0 SHA-256: 67b3107af2a243b67825c99f1b97e37b82fbee779b33cc0318967c857884d663
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on Shopify and other domains, suggesting a link farm or SEO abuse tactic. One of the primary links redirects to a malicious infrastructure, indicating a phishing or redirection attempt. The ML classifier strongly supports the malicious verdict.

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=casting+call+poster+template
    • http://files.tropism.eu/uploads/1/3/0/8/130874134/2fb28c8ab81566.pdf
    • http://files.thebratsmovie.fxlda.com/uploads/1/3/0/8/130814516/kexupomivo_livojetojewazun.pdf
    • http://files.insightcivil.com/uploads/1/3/0/7/130740517/9515659.pdf
    • http://dudixunuw.tubitospizza.com/uploads/1/3/0/7/130738667/badopivo.pdf
    • http://files.somersetparkhoa.com/uploads/1/3/1/4/131438397/jirajupusolares.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/9486/8122/files/soritegupipafu.pdf
    • https://cdn.shopify.com/s/files/1/0437/8470/0055/files/xagofovejoxefudibefipadud.pdf
    • https://cdn.shopify.com/s/files/1/0429/3948/2275/files/google_digital_skills_exam_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/6751/4788/files/pazijegulenelitakipugu.pdf
    • https://cdn.shopify.com/s/files/1/0449/9508/4456/files/77888341904.pdf
    • https://cdn.shopify.com/s/files/1/0431/6663/0037/files/38526022681.pdf
    • https://cdn.shopify.com/s/files/1/0437/5052/3031/files/meri_akhiyan_ka_yo_kajal_song.pdf
    • https://cdn.shopify.com/s/files/1/0433/4786/9850/files/chicken_invaders_apk.pdf
    • https://cdn.shopify.com/s/files/1/0429/2549/0332/files/46509502003.pdf
    • https://cdn.shopify.com/s/files/1/0440/9769/9992/files/34325627320.pdf
    • https://cdn.shopify.com/s/files/1/0454/6861/4808/files/pollination_process.pdf
    • https://cdn.shopify.com/s/files/1/0430/5072/9634/files/dayz_tv_map.pdf
    • https://cdn.shopify.com/s/files/1/0432/9648/9632/files/23756907607.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000078ed.bin
57fb7a0aea5700cd5afcefcbed24c1d5e4dde5e8dd63fb72c5404c902f217d0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78ED 5064 bytes
font_01_sfnt_off00008a05.bin
c848cee177f53a9dcaa361490c210288ff0db6e66dbf3301880fa31baa17a25d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A05 10112 bytes
font_02_sfnt_off0000ac97.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC97 4324 bytes

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