Malicious PDF — malware analysis report

Static analysis result for SHA-256 788c4e31a2794154…

MALICIOUS

PDF

46.3 KB Created: 2020-08-10 20:52:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bfe184ef22c13535803fcf7209e4db6a SHA-1: 73ff7adeffae6a228430642c0fb33c864290b14f SHA-256: 788c4e31a27941543caa1c5bc79de10bd91f2e5ea57f867754dc3d0bfc637c81
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a high density of external links, many pointing to Shopify domains, but one critical link to `ttraff.com` is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains the URL `https://ttraff.com/pify?keyword=bpsc+math+syllabus+pdf`, suggesting a lure to disguise malicious activity as a syllabus download. The presence of numerous links and the malicious redirector strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=bpsc+math+syllabus+pdf
    • http://files.billbartels.com/uploads/1/3/2/6/132695543/popina.pdf
    • http://files.authorrebeccaarogers.com/uploads/1/3/1/6/131637034/wakobobo_jujorufaxeso_puxul.pdf
    • http://files.hopegardencounseling.com/uploads/1/3/1/4/131453823/mufomonizotoni.pdf
    • https://cdn.shopify.com/s/files/1/0429/3066/7673/files/zetinikuloxujofezezu.pdf
    • https://cdn.shopify.com/s/files/1/0447/2619/0234/files/cello_scales_and_arpeggios.pdf
    • https://cdn.shopify.com/s/files/1/0432/5136/8104/files/kegaxevoz.pdf
    • https://cdn.shopify.com/s/files/1/0436/8770/6774/files/wobuwuzivesagelipajopul.pdf
    • https://cdn.shopify.com/s/files/1/0430/1442/2677/files/6603614005.pdf
    • https://cdn.shopify.com/s/files/1/0432/2980/6759/files/argyll_forest_park.pdf
    • https://cdn.shopify.com/s/files/1/0434/3224/7445/files/98149944147.pdf
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/bafoxodemija.pdf
    • https://cdn.shopify.com/s/files/1/0440/0198/4662/files/passive_voice_simple_future_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0431/3897/3857/files/acrostichum_aureum.pdf
    • https://cdn.shopify.com/s/files/1/0431/8930/5501/files/lego_catalogs.pdf
    • https://cdn.shopify.com/s/files/1/0433/9544/8988/files/mario_vaquez_gallery.pdf
    • https://cdn.shopify.com/s/files/1/0429/2807/9004/files/blues_you_can_use_book_of_guitar_chords.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000076b8.bin
5b720a4325e924a57ab5084f601ae90ad4645aa1ce961df50c9f02a145cef3e2
pdf-font-stream PDF embedded font (sfnt) at offset 0x76B8 5588 bytes
font_01_sfnt_off00008996.bin
604c15bccdd131e2aca5f4bf6035e02925395e9f55445864e259b4e221d74b86
pdf-font-stream PDF embedded font (sfnt) at offset 0x8996 10188 bytes