Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeab8408951bad60…

MALICIOUS

PDF

46.3 KB Created: 2020-09-05 11:57:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f752bf192a0d0104361de69a4f923f1e SHA-1: e8b7bf5ea9d214699dbe1d718b64df345856d164 SHA-256: eeab8408951bad60fbc803caf931b16a46786c66112615e112c08a9bb29418ea
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier and contains a link to a known malicious redirector. It also features a large number of embedded links to other PDF files hosted on Shopify, suggesting a link farm or SEO poisoning tactic. The document body contains garbled text and a reference to 'Catchphrase tv show answers', likely a lure to entice users to click the malicious link.

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.club/wix?keyword=catchphrase+tv+show+answers
    • https://cdn.shopify.com/s/files/1/0433/2306/4488/files/electrostatic_boundary_conditions.pdf
    • https://cdn.shopify.com/s/files/1/0427/7652/7014/files/filapazixetujine.pdf
    • https://cdn.shopify.com/s/files/1/0434/3191/9765/files/10817539750.pdf
    • https://cdn.shopify.com/s/files/1/0430/8205/5842/files/govaxilo.pdf
    • https://cdn.shopify.com/s/files/1/0434/8379/1517/files/buwukakotakesa.pdf
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/totipinogaduvup.pdf
    • https://cdn.shopify.com/s/files/1/0429/2784/9639/files/merowurijukutazabem.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3106/files/13774275122.pdf
    • https://cdn.shopify.com/s/files/1/0438/3614/5814/files/34377861019.pdf
    • https://cdn.shopify.com/s/files/1/0431/8219/4852/files/firakajivamebabeboxowo.pdf
    • https://cdn.shopify.com/s/files/1/0429/6884/2393/files/attestation_contribution_formation_professionnelle.pdf
    • https://cdn.shopify.com/s/files/1/0459/2238/6071/files/grand_central_station_map.pdf
    • https://cdn.shopify.com/s/files/1/0437/5429/1354/files/6861700013.pdf
    • https://cdn.shopify.com/s/files/1/0434/1245/5591/files/fogini.pdf
    • https://cdn.shopify.com/s/files/1/0439/8972/9438/files/infosys_off_campus_placement_papers_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/30899617810.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000774c.bin
b348cdab7d2cbf65edb1823934d8afe4d7885ff650e8bc96ace44047a6130aa5
pdf-font-stream PDF embedded font (sfnt) at offset 0x774C 5044 bytes
font_01_sfnt_off0000887c.bin
ad6f15591e041e27fcb53b318005026fbe11e1c2f2265c6118fa5145655ec8a7
pdf-font-stream PDF embedded font (sfnt) at offset 0x887C 10612 bytes