Malicious PDF — malware analysis report

Static analysis result for SHA-256 e07d734ec15642a4…

MALICIOUS

PDF

55.9 KB Created: 2020-08-09 17:56:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1bf0b561cece233ec27470c81fc53136 SHA-1: 7be0f458c1929a1bb6619c052ef0e6ac978d8938 SHA-256: e07d734ec15642a43e538af26d4af1f9cd6263e66d6761962308d8aa34010275
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a malicious redirector link disguised as a book title, which leads to a link farm of other PDFs. The ML classifier strongly indicated maliciousness. The primary malicious IOC is the ttraff.com redirector, which likely serves as a gateway to further malicious content. No scripts were extracted, limiting the analysis of the payload delivery mechanism.

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=the+caine+mutiny+court+martial+pdf
    • http://files.generator-marketing.com/uploads/1/3/0/7/130775135/bumejuvadudapowob.pdf
    • http://xuwirimog.fromthebottom2thetop.com/uploads/1/3/2/8/132814930/b299e4e2.pdf
    • http://files.nursing311.com/uploads/1/3/1/0/131070171/70ef5a4.pdf
    • http://files.johnholmgren.com/uploads/1/3/1/4/131454808/0fc5e0a.pdf
    • https://cdn.shopify.com/s/files/1/0430/8631/5682/files/dasemek.pdf
    • https://cdn.shopify.com/s/files/1/0432/6237/8139/files/ribajalamedasotenafovi.pdf
    • https://cdn.shopify.com/s/files/1/0429/4216/9244/files/zapinajegevozojoza.pdf
    • https://cdn.shopify.com/s/files/1/0434/3519/6568/files/takuril.pdf
    • https://cdn.shopify.com/s/files/1/0428/9812/9062/files/wotupivodejedanojine.pdf
    • https://cdn.shopify.com/s/files/1/0439/2707/7032/files/81792278975.pdf
    • https://cdn.shopify.com/s/files/1/0430/3772/0733/files/sekubunowi.pdf
    • https://cdn.shopify.com/s/files/1/0433/3443/4969/files/34975665429.pdf
    • https://cdn.shopify.com/s/files/1/0437/0078/1208/files/sovonepo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9443/4202/files/68013482393.pdf
    • https://cdn.shopify.com/s/files/1/0429/7729/6543/files/gevetapelukabitafosutoruf.pdf
    • https://cdn.shopify.com/s/files/1/0432/3642/5883/files/27641333296.pdf
    • https://cdn.shopify.com/s/files/1/0434/0147/8300/files/que_son_las_redes_troficas.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_off00009db8.bin
433746033f1ad9cb81012af7451c50d305793023afafeae874ad3acd5dcc08ff
pdf-font-stream PDF embedded font (sfnt) at offset 0x9DB8 5268 bytes
font_01_sfnt_off0000af84.bin
460e9ba2759d8f03485561dfd3f6f7de9e4b1e826e2cc0e5a1ad81cb21d30096
pdf-font-stream PDF embedded font (sfnt) at offset 0xAF84 10404 bytes