Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f949b12f57d237f…

MALICIOUS

PDF

40.4 KB Created: 2020-08-03 21:03:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7684437d694c7d02e2f293334976bde7 SHA-1: 9e6cd7c9fb081cf58237346fc45261027cd16e72 SHA-256: 6f949b12f57d237fb2a5cd4fa107b4024bc8bc98b9dba2e9be0a6c6f11ac070b
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, with one specifically identified as a malicious redirector. The presence of numerous external PDF links suggests an attempt at SEO manipulation or a link farm to distribute malicious content. While no scripts were extracted, the heuristic firings strongly indicate malicious intent through link manipulation.

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.ru/pify?keyword=bataan+nuclear+power+plant+pdf
    • http://files.4waybasics.org/uploads/1/3/1/0/131070246/vebikafizebopujuka.pdf
    • http://files.nwcoasttrader.com/uploads/1/3/0/7/130740442/e22735a60.pdf
    • http://files.bgrtampabay.com/uploads/1/3/1/6/131606502/luporex-wavelalej-dakag.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1020/3556/files/zusokod.pdf
    • https://cdn.shopify.com/s/files/1/0445/4537/6420/files/allied_barton_security_employee_handbook.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44603331863.pdf
    • https://cdn.shopify.com/s/files/1/0437/2247/3624/files/74612061217.pdf
    • https://cdn.shopify.com/s/files/1/0430/6763/7917/files/apes_frq_2015.pdf
    • https://cdn.shopify.com/s/files/1/0429/0006/2367/files/jifukesodi.pdf
    • https://cdn.shopify.com/s/files/1/0435/6780/8667/files/relimotefutelub.pdf
    • https://cdn.shopify.com/s/files/1/0435/2340/8032/files/45192439289.pdf
    • https://cdn.shopify.com/s/files/1/0427/7754/2823/files/27826232293.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8867/files/66942047044.pdf
    • https://cdn.shopify.com/s/files/1/0431/1210/4103/files/xizizogan.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_off00006087.bin
765ced550eb5037fc0d7cbf800d6b0e037e73b1381eacbc25b7a5717fc24de25
pdf-font-stream PDF embedded font (sfnt) at offset 0x6087 5112 bytes
font_01_sfnt_off00007213.bin
87a27b8936b5e788fb4892fcc24dac05c335b56a4900a187468fab04433a42a6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7213 10244 bytes