Malicious PDF — malware analysis report

Static analysis result for SHA-256 72f6ccad1fabfc55…

MALICIOUS

PDF

53.7 KB Created: 2020-08-13 21:41:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32d62e0bd3f66462d10ae1e15225bd35 SHA-1: b1f1839c0d03d881db3b3a825d2f2d48706a0a82 SHA-256: 72f6ccad1fabfc5594d2d7403fdead21dc421c439ceab2a28d4f1090d8feb9b2
182 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including one pointing to known malicious redirector infrastructure at ttraff.ru. The document body also contains a URL that is likely part of this link farm. This suggests the document is designed to lead users to malicious sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/pify?keyword=opera+mini+app++for+android
    • http://files.jordandeadseaminerals.com/uploads/1/3/2/3/132302995/jelubabem_fetijum_rixinofutuz_fomakinewo.pdf
    • http://files.arcticbutcher.com/uploads/1/3/1/0/131071067/jugawuk.pdf
    • http://files.theefficienthouse.com/uploads/1/3/2/7/132710491/mogarati.pdf
    • http://files.frenchlakebutchershop.com/uploads/1/3/0/8/130874120/padotusamugemir.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/2027/1264/files/rubokuga.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/41557636134.pdf
    • https://cdn.shopify.com/s/files/1/0434/4401/1168/files/designing_brand_identity_5th_edition_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/0079/1191/files/70501150229.pdf
    • https://cdn.shopify.com/s/files/1/0432/7571/4723/files/kafujer.pdf
    • https://cdn.shopify.com/s/files/1/0435/7164/2527/files/33966358185.pdf
    • https://cdn.shopify.com/s/files/1/0433/4062/8120/files/darekakurebivijogakinoma.pdf
    • https://cdn.shopify.com/s/files/1/0433/6418/8312/files/junas.pdf
    • https://cdn.shopify.com/s/files/1/0433/4744/3865/files/trastorno_de_angustia_sin_agorafobia.pdf
    • https://cdn.shopify.com/s/files/1/0431/2861/9168/files/wopimilenekaxepojem.pdf
    • https://cdn.shopify.com/s/files/1/0436/9865/1288/files/83862812139.pdf
    • https://cdn.shopify.com/s/files/1/0431/2776/7206/files/6192584454.pdf
    • https://cdn.shopify.com/s/files/1/0430/8847/8365/files/sirike.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mapitawaluzosamorexub.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ec5.bin
9ae2f2e9800a670646c673e828fadeb4effd96b92f6b92bdfc36f9f2e624beb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EC5 6864 bytes
font_01_sfnt_off0000862b.bin
7055c46157ab732c8d744c97a52e3a5c2c9f69a2b3214459394f1457edafcbf7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x862B 4712 bytes
font_02_sfnt_off00009602.bin
c44d27cc26191744cd03a58af92598087977ce616b1b97a55543050650948272		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9602 10764 bytes
font_03_sfnt_off0000baa2.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBAA2 4324 bytes

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