Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dc30d46192eb3a6…

MALICIOUS

PDF

37.4 KB Created: 2020-08-25 20:05:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fca5560fd6c4746b3e01cdc1588707da SHA-1: 5ec7aa105ee320e2ac71c873d51174c20cd98b63 SHA-256: 6dc30d46192eb3a6c729f9b7a1fb1dec4f9e37ac03680c00127682c46957a7bb
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but also includes a critical link to a known malicious redirector at 'ttraff.club'. The document body, though heavily obfuscated, contains the same malicious URL and a reference to 'the evil within 2 how many chapters', suggesting a lure. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent, likely to redirect users to malicious sites or download further payloads.

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.club/pify?keyword=the+evil+within+2+how+many+chapters
    • http://butufu.janmaureen.com/uploads/1/3/2/6/132681464/vavonimubat.pdf
    • http://files.bluegrasseducation.com/uploads/1/3/2/3/132303019/bdff4cb1e29b4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2358/0831/files/company_tax_return_form_2017.pdf
    • https://cdn.shopify.com/s/files/1/0461/9993/1030/files/police_bharti_2019_online_form_date.pdf
    • https://cdn.shopify.com/s/files/1/0429/1143/2867/files/mumonigikexupufelug.pdf
    • https://cdn.shopify.com/s/files/1/0429/1664/2975/files/93334198420.pdf
    • https://cdn.shopify.com/s/files/1/0431/1639/6697/files/chatrapathi_audio_songs_now.pdf
    • https://cdn.shopify.com/s/files/1/0431/7977/0019/files/27319782525.pdf
    • https://cdn.shopify.com/s/files/1/0434/7926/9541/files/67878342649.pdf
    • https://cdn.shopify.com/s/files/1/0438/6209/8085/files/53207390477.pdf
    • https://cdn.shopify.com/s/files/1/0436/5352/9753/files/jimiposabogoraj.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_off0000540c.bin
629bfa323cd4e6a483f3620f25b33cb29d2e3b678fca3734d9daa838aedda9c7
pdf-font-stream PDF embedded font (sfnt) at offset 0x540C 5508 bytes
font_01_sfnt_off000066b1.bin
3210e320ccdd08e8312e5fdf50ac8c1a2c0b3de68ff9077f73086fce6bed24da
pdf-font-stream PDF embedded font (sfnt) at offset 0x66B1 10184 bytes