Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a100af7ae2dbcac…

MALICIOUS

PDF

33.5 KB Created: 2020-08-28 07:04:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2005935c44639b9115ee53e6d411386b SHA-1: 81453af3359cdb9c7a8460829f935cbdb26573ad SHA-256: 3a100af7ae2dbcac86e129afe50501fe26d677eaab845f9908f22f44a0ab8d9d
154 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous embedded URLs, including a critical redirector link to ttraff.com. The document body, though heavily obfuscated, contains text related to 'Mountford shoes melbourne' and the malicious URL, suggesting a lure to a phishing or scam page. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=mountford+shoes+melbourne
    • http://files.spcwaterdistrict.com/uploads/1/3/0/9/130969545/6432641.pdf
    • http://jisovazef.amandabarnaby.com/uploads/1/3/1/8/131856959/4008111.pdf
    • https://cdn.shopify.com/s/files/1/0428/1437/4047/files/lulowokegejigiwosala.pdf
    • https://cdn.shopify.com/s/files/1/0431/1882/1530/files/apresentao_empresa_em.pdf
    • https://cdn.shopify.com/s/files/1/0428/8030/3270/files/25589943238.pdf
    • https://cdn.shopify.com/s/files/1/0448/8983/3639/files/social_networking_sites.pdf
    • https://cdn.shopify.com/s/files/1/0436/6876/6873/files/97568487579.pdf
    • https://cdn.shopify.com/s/files/1/0428/1496/3868/files/12706389756.pdf
    • https://cdn.shopify.com/s/files/1/0440/0657/2182/files/62058325438.pdf
    • https://cdn.shopify.com/s/files/1/0432/3042/9346/files/47151973679.pdf
    • https://cdn.shopify.com/s/files/1/0433/6451/6005/files/zuwobazavewojorapad.pdf
    • https://cdn.shopify.com/s/files/1/0430/7507/6258/files/chhota_bheem_song_please.pdf
    • https://cdn.shopify.com/s/files/1/0430/2176/2723/files/vigiza.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_off0000467d.bin
3c497f360fe95b3dae925a62cf1de3f270f6122a40cab7a86eadfc85092efe10
pdf-font-stream PDF embedded font (sfnt) at offset 0x467D 5084 bytes
font_01_sfnt_off0000579f.bin
6409b303e0584170d74213ab2e9d1220938ab4a737813e8b83b4659055d665f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x579F 9840 bytes