Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e43a1b529c6cede…

MALICIOUS

PDF

63.5 KB Created: 2020-08-17 02:23:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 283daefa1aa73113f72a70d35f74f5be SHA-1: e27ad5320baa6512276ad9efe04cef45c5d122f9 SHA-256: 5e43a1b529c6cede8a33d4eb53860323d9540d49754f3383baa93e4da8610479
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one prominently pointing to 'ttraff.com', identified as a malicious redirector. The document body, though partially corrupted, includes text suggesting a 'cataloguing rules pdf' lure. The presence of numerous external PDF links, including a link to a Shopify domain, indicates a link farm strategy, likely to obscure the malicious redirector.

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=cataloguing+rules+pdf
    • http://files.benjaminsmithfineart.com/uploads/1/3/2/7/132740778/bda5c0dc689c834.pdf
    • http://files.bethahatch.com/uploads/1/3/0/9/130969032/tugitafiz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/3075/8054/files/nofozisipokubof.pdf
    • https://cdn.shopify.com/s/files/1/0434/8408/6424/files/hillsong_worship_songs_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0447/2215/9772/files/atomic_number_and_mass_number.pdf
    • https://cdn.shopify.com/s/files/1/0432/9360/6048/files/bodmas_questions_for_railway.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8867/files/xevejikemugupadisa.pdf
    • https://cdn.shopify.com/s/files/1/0430/0426/4601/files/30748962244.pdf
    • https://cdn.shopify.com/s/files/1/0437/8719/0434/files/mofetojom.pdf
    • https://cdn.shopify.com/s/files/1/0435/3854/6840/files/bizakew.pdf
    • https://cdn.shopify.com/s/files/1/0433/3345/1944/files/lekaxejuke.pdf
    • https://cdn.shopify.com/s/files/1/0431/6138/7170/files/gofekasizujezalu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7346/1660/files/thinking_skills_critical_thinking_and_problem_solving_free.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_off0000ab1f.bin
e271bbca6acbca41a2c14a9c36770aec2f8153369884e295117daa11b3a1ca2f
pdf-font-stream PDF embedded font (sfnt) at offset 0xAB1F 5112 bytes
font_01_sfnt_off0000bc94.bin
40789a090a95fb29ca78b38d15672f2f5296e072f22cbda8eb2e33559070c4c2
pdf-font-stream PDF embedded font (sfnt) at offset 0xBC94 11900 bytes
font_02_sfnt_off0000e31e.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0xE31E 4324 bytes