Malicious PDF — malware analysis report

Static analysis result for SHA-256 65133fd7eb0c6805…

MALICIOUS

PDF

43.8 KB Created: 2020-09-14 04:09:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a309ba58061c692118c45557561f49ba SHA-1: bc3456b19ad534a82107dc6902358e577eff0719 SHA-256: 65133fd7eb0c68050c92c87f2ccf1e9d53434849ac4179f2fe1539147c2a69ec
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, many of which point 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.link, which is likely the primary malicious payload delivery mechanism. The document body itself is heavily obfuscated but contains references to the redirector URL and other benign-looking PDF links.

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.link/wix?keyword=second+law+of+thermodynamics+worksheet+pdf
    • http://files.sccottawa.com/uploads/1/3/1/8/131872087/tepukutunovekaw.pdf
    • http://nokuja.pinnacleadvisorygroup-in.com/uploads/1/3/0/7/130738799/misumari-pujosuri-xogapuz.pdf
    • http://files.eventsforafrica.com/uploads/1/3/1/4/131437276/54c4226625237df.pdf
    • http://files.micheleyoung.net/uploads/1/3/2/6/132695644/8331091.pdf
    • http://files.northernmichigangallery.com/uploads/1/3/1/3/131380493/loroxirun.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/4380/5591/files/adobe_xd_assets_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/4528/9127/files/printable_weekly_work_schedule_template.pdf
    • https://cdn.shopify.com/s/files/1/0440/6539/0757/files/nolaw.pdf
    • https://cdn.shopify.com/s/files/1/0438/3395/0358/files/lozusutiromabetuwik.pdf
    • https://cdn.shopify.com/s/files/1/0432/7653/3916/files/pamexaliwovogowitokug.pdf
    • https://cdn.shopify.com/s/files/1/0433/0012/6885/files/the_social_identity_theory_of_interg.pdf
    • https://cdn.shopify.com/s/files/1/0457/8115/5996/files/kigopezozanenigamixepop.pdf
    • https://cdn.shopify.com/s/files/1/0431/6240/2967/files/cause_and_effect_essay_example.pdf
    • https://cdn.shopify.com/s/files/1/0433/8240/7335/files/mesuxej.pdf
    • https://cdn.shopify.com/s/files/1/0436/6457/2569/files/who_is_richest_nascar_driver.pdf
    • https://cdn.shopify.com/s/files/1/0433/7552/6042/files/doodle_coloring_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0429/4321/7830/files/wopemakaxakuwikol.pdf
    • https://cdn.shopify.com/s/files/1/0436/2030/3011/files/58162337563.pdf
    • https://cdn.shopify.com/s/files/1/0430/8333/3785/files/word_invoice_template_free.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_off00006aef.bin
3c8a2e7e7b6203b3bd0b34c93ef705aac8ea57944026b0060bda603420cb8701		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AEF 5756 bytes
font_01_sfnt_off00007e7c.bin
18ea9f4f8b3243186d8bfd42fa57c8c0f9b38bb4f9976b71ecbbc3443458e572		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E7C 10400 bytes

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