Malicious PDF — malware analysis report

Static analysis result for SHA-256 169ad34bbcd08bd7…

MALICIOUS

PDF

39.4 KB Created: 2020-09-01 08:00:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 197231d4b870a434da69b7bcda2ae362 SHA-1: 22743d99e2e1ffc979250303f724a0f3cc52cea5 SHA-256: 169ad34bbcd08bd7723124954e43358cfdab9fd16442e1ce341f9bff93624171
154 Risk Score

Malware Insights

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

This PDF document contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the URL https://ttraff.cc/wix?keyword=report+someone+illegal+immigration+uk. The document body, though heavily obfuscated, contains this malicious URL and references to PDF link farms, indicating a social engineering attempt to drive traffic to potentially harmful content. The ML classifier strongly flagged this PDF as malicious.

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.cc/wix?keyword=report+someone+illegal+immigration+uk
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/9360/5014/files/91271993838.pdf
    • https://cdn.shopify.com/s/files/1/0434/6091/9461/files/33635750399.pdf
    • https://cdn.shopify.com/s/files/1/0429/3237/1622/files/gugavuliginipadolutalut.pdf
    • https://cdn.shopify.com/s/files/1/0431/3645/0717/files/evaluating_logarithms_worksheet_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/4606/7605/files/77612852695.pdf
    • https://cdn.shopify.com/s/files/1/0432/7453/5067/files/happy_wheels_download_android.pdf
    • https://static.usrfiles.com/ugd/bf0735_af86f44259994431be00dec586ac043a.pdf
    • https://static.usrfiles.com/ugd/b8c837_161ab6fb037247e781f9f91ce5671a02.pdf
    • https://static.usrfiles.com/ugd/4c1554_249b4a59725b437091b739d9c05725b6.pdf
    • https://static.usrfiles.com/ugd/b8c837_273db06355834ebeb9bc3451295e22a3.pdf
    • https://static.usrfiles.com/ugd/b8c837_84afb516428d45e69379c618e354cae9.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_off00005bb4.bin
35cab2219853d5bc71025ed598dc03475a2f9c5569b09854be36734e19383f28
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BB4 5212 bytes
font_01_sfnt_off00006d5e.bin
d235bf6ea87654f363a91dc8b7a433b9194bf588ab76aae70fd79a90be1732e0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D5E 10548 bytes