Malicious PDF — malware analysis report

Static analysis result for SHA-256 169fb4af9a058f82…

MALICIOUS

PDF

43.6 KB Created: 2020-08-11 19:52:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8124be5de7f0d169e6e30d2e8a7416a7 SHA-1: 73ae62d4332752c67d954aee3830aa72480e827c SHA-256: 169fb4af9a058f8259dc136f1472ddca5f3a701c1a5cd480bafbed9766949ae3
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one prominent link disguised as an 'Alcatel pop 4 plus manual pdf'. This link redirects to 'ttraff.com', which is flagged as malicious redirector infrastructure. The document also contains a large number of links to various PDF files hosted on Shopify, likely an attempt to manipulate search engine results for SEO purposes. The ML classifier strongly indicates 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=alcatel+pop+4+plus+manual+pdf
    • http://files.stephenieayoung.com/uploads/1/3/2/7/132712234/502555e22.pdf
    • http://rixolu.bulldankennels.com/uploads/1/3/1/3/131379246/solewo.pdf
    • http://kukuxo.becomingscollective.org/uploads/1/3/0/8/130814328/6020418.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/0981/0343/files/13106324585.pdf
    • https://cdn.shopify.com/s/files/1/0432/2790/6206/files/valor_agregado_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0428/2207/4534/files/6377913561.pdf
    • https://cdn.shopify.com/s/files/1/0429/7274/1791/files/satesozuzefasozu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7287/9782/files/sony_ericson_w_580i.pdf
    • https://cdn.shopify.com/s/files/1/0431/0866/3456/files/16654932140.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zudofujavulasosajawigubi.pdf
    • https://cdn.shopify.com/s/files/1/0432/7764/8027/files/2011_jeep_grand_cherokee_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/5633/9861/files/ti_paper_trail_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0447/6112/0919/files/public_policy.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e0e.bin
199c9575670f70393a49e35b91db6ad581ab8bdc98c5748e4e3162fb61b9554f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E0E 5116 bytes
font_01_sfnt_off00006f60.bin
854fc9ba2bc8b527e130d673df90561ba2fba2008c0f0459298d53fe91990c99
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F60 10604 bytes
font_02_sfnt_off000093ab.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x93AB 4324 bytes