Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f4f2830a5a2b8cc…

MALICIOUS

PDF

48.8 KB Created: 2020-08-31 09:16:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 242b1673215ec8c4aa46ad33b19f69ff SHA-1: e8adc1e500f41be7f82b91ec045850d1c14e9b53 SHA-256: 6f4f2830a5a2b8cce17115fa7badeefe950cfc4e7d72f04fba225a791a77f791
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which directs to a known malicious redirector. The document body, though heavily obfuscated, contains text referencing 'Actemra side effects bad breath' and the malicious URL, suggesting a phishing or scam attempt. The presence of numerous external PDF links further indicates a link farm designed to distribute malicious content.

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/wix?keyword=actemra+side+effects+bad+breath
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_2a92d4228df245729137bddd11933ccb.pdf
    • https://static.usrfiles.com/ugd/0a0016_7f7720dbde22421a87ff26fcb8d7da96.pdf
    • https://static.usrfiles.com/ugd/badafb_5926153dc16e463fb04fab350875a327.pdf
    • https://static.usrfiles.com/ugd/a01749_1c9856af425a4e6596f1c5f68ab1103f.pdf
    • https://static.usrfiles.com/ugd/97368a_93632436560b423e897e602c2fe6517b.pdf
    • https://cdn.shopify.com/s/files/1/0451/0436/5733/files/xekivafebawexunezopaxijov.pdf
    • https://cdn.shopify.com/s/files/1/0434/1871/4264/files/313645466.pdf
    • https://cdn.shopify.com/s/files/1/0428/4180/0860/files/puzatagetifu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6701/5322/files/19947344537.pdf
    • https://cdn.shopify.com/s/files/1/0439/4188/8155/files/titumupu.pdf
    • https://cdn.shopify.com/s/files/1/0461/7076/7512/files/78324335901.pdf
    • https://cdn.shopify.com/s/files/1/0432/8731/4585/files/movimiento_caida_libre.pdf
    • https://cdn.shopify.com/s/files/1/0432/3046/2116/files/chrome_plugins_viewer_enable.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_off00008096.bin
8131b0a58e55a799df98d62b4fe0cdceea65a3ae726bbafb215e43e9de9c043d
pdf-font-stream PDF embedded font (sfnt) at offset 0x8096 5356 bytes
font_01_sfnt_off0000929a.bin
4b4252be925962a31097e424f608b13422440ce087e893959ee9c1f79e01f4d6
pdf-font-stream PDF embedded font (sfnt) at offset 0x929A 10456 bytes