Malicious PDF — malware analysis report

Static analysis result for SHA-256 153e0e8c0937a328…

MALICIOUS

PDF

35.2 KB Created: 2020-08-25 04:40:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f9959b4f026655b2996a584be5708d0 SHA-1: bba9a94103075a8a03335ff757a1ee119ecf36c9 SHA-256: 153e0e8c0937a3289ffad2de350c55e1c09fc8c0af3f67d1763d89b2eb803ba9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to Shopify domains hosting other PDFs, but one critical link directs to 'ttraff.com', identified as a malicious redirector. This suggests a link farm or SEO poisoning tactic to distribute malicious content. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the embedded links are the primary vector for malicious activity.

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=dictionary+worksheets+3rd+grade
    • http://files.dawnanncurtis.com/uploads/1/3/1/3/131398515/terijazegiridut.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/9408/0677/files/97707515788.pdf
    • https://cdn.shopify.com/s/files/1/0430/8333/3786/files/zininugobunemasunom.pdf
    • https://cdn.shopify.com/s/files/1/0433/5996/1239/files/huawei_p9_plus_android_7._0.pdf
    • https://cdn.shopify.com/s/files/1/0429/6278/0311/files/how_to_highlight_text_in_discord.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72890356131.pdf
    • https://cdn.shopify.com/s/files/1/0435/2396/5080/files/rexowonodasubolonajam.pdf
    • https://cdn.shopify.com/s/files/1/0434/1576/5153/files/92406180181.pdf
    • https://cdn.shopify.com/s/files/1/0430/7494/5184/files/rasazubitise.pdf
    • https://cdn.shopify.com/s/files/1/0431/2301/5836/files/83377380964.pdf
    • https://cdn.shopify.com/s/files/1/0432/4461/7885/files/83072631195.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_off00004b80.bin
5a168ed2f59e99a7cfe9165f9412fbbbe4fc73aa5b5b6ac748778626493e1ffa
pdf-font-stream PDF embedded font (sfnt) at offset 0x4B80 5588 bytes
font_01_sfnt_off00005e96.bin
154c23148e9d9fbc43df8ff9a4f55f9d17a9b8df17759d04a3fe11cac5e96c9b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E96 9848 bytes