Malicious PDF — malware analysis report

Static analysis result for SHA-256 17346058dd19f217…

MALICIOUS

PDF

50.4 KB Created: 2020-08-22 04:28:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d307ef704bc81a65d7639fb491ca8a9c SHA-1: cb53f3fa4bfccd9492a9bc27b4fe8e8c67930e7b SHA-256: 17346058dd19f2171bbf73ead54e144ab5cb669105af4e5d4e0f5d507779700d
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body also contains this URL, suggesting it's the primary lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many of which point to Shopify domains hosting other PDFs. 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.com/pify?keyword=ms+word+mailing+labels+from+excel+spreadsheet
    • http://files.wayhomeproject.com/uploads/1/3/1/4/131437680/fasolipupowev.pdf
    • http://mewujig.pholmes-iplaw.com/uploads/1/3/2/6/132682866/c4e6928a.pdf
    • http://files.cincigreyhounds.com/uploads/1/3/1/3/131383924/biderujulalifotasume.pdf
    • http://files.thecottagebaker.net/uploads/1/3/1/6/131637016/jozofalefavom_gakoxabipimaku_wonorolisud.pdf
    • http://files.oligumm.com/uploads/1/3/0/9/130969740/8528024.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/0159/3502/files/b._com_part_2_auditing_notes.pdf
    • https://cdn.shopify.com/s/files/1/0430/5226/9717/files/bavojojarizefutotoxowoka.pdf
    • https://cdn.shopify.com/s/files/1/0440/1430/5430/files/vimanobe.pdf
    • https://cdn.shopify.com/s/files/1/0429/6779/3817/files/zerufabenopinaxep.pdf
    • https://cdn.shopify.com/s/files/1/0432/0316/6372/files/wusakezejided.pdf
    • https://cdn.shopify.com/s/files/1/0440/0755/5222/files/pcv_mcv_mch_mchc_rdw_full_form.pdf
    • https://cdn.shopify.com/s/files/1/0431/2724/2906/files/nupoju.pdf
    • https://cdn.shopify.com/s/files/1/0434/0406/6983/files/95125673355.pdf
    • https://cdn.shopify.com/s/files/1/0430/2022/2627/files/vafadaxovogefadoxofuzeren.pdf
    • https://cdn.shopify.com/s/files/1/0432/9930/7688/files/auto_repair_request_form.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_off000085a0.bin
45695d17dae5cac55f54890cdfd5499758dd911f6e6de7229efc9b70715ec64d
pdf-font-stream PDF embedded font (sfnt) at offset 0x85A0 5876 bytes
font_01_sfnt_off0000998e.bin
465735b8f5eeaca12bb52fe00c313a8ca9d752f64fee319caf83498ed8fbe827
pdf-font-stream PDF embedded font (sfnt) at offset 0x998E 10172 bytes