Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d8959af4fee5d1e…

MALICIOUS

PDF

44.2 KB Created: 2020-08-12 10:07:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d98ace37254486f74c9c339896070f5 SHA-1: 57780370be8924dd8cf1dc6621c8b958206ddc2a SHA-256: 7d8959af4fee5d1e932a9e7cea2f01f47af4d59659ff3beec1efba112dc80684
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to what appears to be a link farm hosted on Shopify. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains references to the same URLs, reinforcing the malicious intent. No scripts were extracted from this sample.

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.cc/pify?keyword=technical+analysis+of+financial+markets+by+john+murphy+pdf
    • http://files.designrightkitchens.com/uploads/1/3/1/4/131407315/9125024.pdf
    • http://files.runwithconstanza.com/uploads/1/3/2/7/132712326/1490766.pdf
    • http://files.decipheringtheuniverse.com/uploads/1/3/1/6/131636806/sopewupazarelufokaxe.pdf
    • http://files.milestoneco.net/uploads/1/3/0/7/130740444/nizanu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5702/9019/files/keguwibuza.pdf
    • https://cdn.shopify.com/s/files/1/0431/5866/7430/files/13356992980.pdf
    • https://cdn.shopify.com/s/files/1/0433/7536/2198/files/37756927942.pdf
    • https://cdn.shopify.com/s/files/1/0427/8288/4006/files/22577996067.pdf
    • https://cdn.shopify.com/s/files/1/0432/9173/8277/files/certified_nurse_educator_exam_practice_questions.pdf
    • https://cdn.shopify.com/s/files/1/0433/4606/7621/files/14596031122.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/28603075132.pdf
    • https://cdn.shopify.com/s/files/1/0434/1317/6469/files/katofuvetux.pdf
    • https://cdn.shopify.com/s/files/1/0437/8689/5512/files/wofedizoxopor.pdf
    • https://cdn.shopify.com/s/files/1/0437/3587/5749/files/accounting_ledger_list.pdf
    • https://cdn.shopify.com/s/files/1/0432/9488/4000/files/19018303951.pdf
    • https://cdn.shopify.com/s/files/1/0427/9074/8316/files/sidivorodekedekujibumowej.pdf
    • https://cdn.shopify.com/s/files/1/0437/7473/8586/files/calibration_curve_of_paracetamol.pdf
    • https://cdn.shopify.com/s/files/1/0438/2919/9005/files/50053851149.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058c6.bin
9b30653d1b1710b9445dd13711936ae2de8babce500affa812c49dcf52ecaf6b
pdf-font-stream PDF embedded font (sfnt) at offset 0x58C6 5728 bytes
font_01_sfnt_off00006c0b.bin
1f608b630c02850a9816948b5e245471b452dcb90fdc3c0196335dfdf52007ff
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C0B 9504 bytes
font_02_sfnt_off00008cc0.bin
4354bd37e85197a997b2f6c8c8698034d2711068b41d1b66819094364c364bcc
pdf-font-stream PDF embedded font (sfnt) at offset 0x8CC0 16544 bytes