Malicious PDF — malware analysis report

Static analysis result for SHA-256 69dc19ec7de1c602…

MALICIOUS

PDF

37.2 KB Created: 2020-08-15 05:12:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15aaa880392717220931cf8273666e57 SHA-1: 0509dc725a535e5d029eced9d99545fb77d87103 SHA-256: 69dc19ec7de1c6020534dde49123051df3324336b0607d5498b704cb7a8aa755
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised as a car manual. The document also exhibits characteristics of a link farm, embedding numerous external links, many of which point to Shopify domains hosting PDF files. The ML classifier strongly indicates maliciousness, and the embedded URLs suggest an attempt to lure users to malicious infrastructure.

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=2018+chrysler+pacifica+touring+l+plus+manual
    • http://pibarul.aapioneermarketing.com/uploads/1/3/0/8/130874232/nagegu.pdf
    • http://files.blessthischildministries.com/uploads/1/3/2/3/132303170/pavalabu.pdf
    • http://files.mickpedderelectrical.com/uploads/1/3/1/4/131406412/29f3a.pdf
    • http://suliwa.techreviewsandnews.com/uploads/1/3/1/4/131454696/c337d148c809.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/7658/2552/files/edward_said_orientalism.pdf
    • https://cdn.shopify.com/s/files/1/0427/8799/5814/files/53795031716.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99237037604.pdf
    • https://cdn.shopify.com/s/files/1/0447/5614/0186/files/pilot_aptitude_test_maths.pdf
    • https://cdn.shopify.com/s/files/1/0438/5511/8501/files/jurajadibovebepax.pdf
    • https://cdn.shopify.com/s/files/1/0428/3426/4231/files/omb_a_122_circular.pdf
    • https://cdn.shopify.com/s/files/1/0429/8178/5753/files/39318028595.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/wunawusifo.pdf
    • https://cdn.shopify.com/s/files/1/0432/1430/7496/files/44380365431.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_off0000505f.bin
0e8b8fdc85c77167d55ce501976b488fd661cb73d84fa1b9757de82cb0a9f6cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x505F 5956 bytes
font_01_sfnt_off00006477.bin
e97e51b4256595a58ac9d23c6e6a71b818885aa3d64af6e7aa741b1d461cd735
pdf-font-stream PDF embedded font (sfnt) at offset 0x6477 10324 bytes