Malicious PDF — malware analysis report

Static analysis result for SHA-256 07789148ec899e27…

MALICIOUS

PDF

41.0 KB Created: 2020-07-31 22:46:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19cef4c72251bfa4704d059caca9b0e4 SHA-1: a35408397fa38eb42cf2923032b4c8adee587929 SHA-256: 07789148ec899e2710863b5c53297c735956c7d9e4fa3870ffe8abb9df2e7827
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=party+popper+emoji', which is flagged as a malicious redirector. The presence of numerous links suggests an attempt to lure users to malicious sites, likely for phishing or malware downloads.

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/pify?keyword=party+popper+emoji
    • http://files.mealmastermpc.com/uploads/1/3/1/3/131379406/lagopojivujapakit.pdf
    • http://files.streetwareaffiliated.com/uploads/1/3/1/4/131407668/sijovi_zamaxi.pdf
    • http://files.jasonmarshallconsulting.com/uploads/1/3/1/4/131406649/doviziruvepebaju.pdf
    • http://files.darksidegym.com/uploads/1/3/2/6/132680860/gopuveje-wolugisajaxobaz-nixodiv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/8424/3351/files/vikugekixujiridej.pdf
    • https://cdn.shopify.com/s/files/1/0429/0645/2127/files/42857621444.pdf
    • https://cdn.shopify.com/s/files/1/0434/7111/0308/files/48862416933.pdf
    • https://cdn.shopify.com/s/files/1/0434/0790/0835/files/48527622673.pdf
    • https://cdn.shopify.com/s/files/1/0431/3235/4711/files/48153232609.pdf
    • https://cdn.shopify.com/s/files/1/0434/6360/6437/files/lajomumizozawinivuz.pdf
    • https://cdn.shopify.com/s/files/1/0434/0301/8392/files/wurosizolidexejuxebekefo.pdf
    • https://cdn.shopify.com/s/files/1/0437/0723/6503/files/zemozijobegijadifatirib.pdf
    • https://cdn.shopify.com/s/files/1/0431/4356/1376/files/bozaw.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_off00006365.bin
49bd5a34779f736797cda55f965174c2a55f2e66c78598ff5e190259ef1e9952
pdf-font-stream PDF embedded font (sfnt) at offset 0x6365 4936 bytes
font_01_sfnt_off00007426.bin
c50206e7034d317702ea746e9034c31f319cf7c9afc7ee66cc87306eee1fb022
pdf-font-stream PDF embedded font (sfnt) at offset 0x7426 10412 bytes