Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9180c5a15ffe356…

MALICIOUS

PDF

50.0 KB Created: 2020-08-14 18:52:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c20f6a7d6583cfe07551447cf3be51c6 SHA-1: 6a58836b1ee80d4f09c1f101459e33ba0a5e54ae SHA-256: b9180c5a15ffe356ee5e08fadf6afac5eb5a9b622a2c290b9831420f49f6b7c5
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=star+ocean+anamnesis+awakening+guide'. This URL is likely used to redirect users to a phishing site or to download further malicious content. The document also exhibits characteristics of a PDF link farm, with numerous embedded links, many of which point to Shopify domains hosting PDF files. The ML classifier strongly supports the malicious verdict. No scripts were extracted, but the presence of the malicious redirector and the link farm structure indicate a delivery mechanism for malicious payloads.

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=star+ocean+anamnesis+awakening+guide
    • http://files.cristiansulea.com/uploads/1/3/0/7/130775970/ad9db0c45.pdf
    • http://sokuwidat.brand2bseen.com/uploads/1/3/1/4/131410007/tizobaw.pdf
    • http://gevijuj.jazzetc.org/uploads/1/3/0/8/130874284/e65cbaed3.pdf
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/theory_of_interest_kellison.pdf
    • https://cdn.shopify.com/s/files/1/0437/6500/6494/files/dekoduve.pdf
    • https://cdn.shopify.com/s/files/1/0440/6686/5302/files/artelac_colirio_bula.pdf
    • https://cdn.shopify.com/s/files/1/0431/0263/4148/files/sinona.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/20583249787.pdf
    • https://cdn.shopify.com/s/files/1/0429/8909/3018/files/silukefikoxolisexid.pdf
    • https://cdn.shopify.com/s/files/1/0431/8851/9076/files/bulefo.pdf
    • https://cdn.shopify.com/s/files/1/0430/9932/4580/files/19256729790.pdf
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/jitajakumetine.pdf
    • https://cdn.shopify.com/s/files/1/0428/7902/5318/files/advances_in_meteorology_climatology_and_atmospheric_physics.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000638a.bin
c2432b0e9c8d9a921020eb32754ebe7e93b3021e31d7c8888e0b8e8212765f0d
pdf-font-stream PDF embedded font (sfnt) at offset 0x638A 3516 bytes
font_01_sfnt_off00006ff8.bin
506abdb01a5cd758eda2fb10dc5732e75007ed5aecee7bfa3829ccbf366588b8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF8 5484 bytes
font_02_sfnt_off0000828a.bin
08431fab633947336e0b7252034f648f7a1d6d5562f772d13e848a5940280a90
pdf-font-stream PDF embedded font (sfnt) at offset 0x828A 10128 bytes
font_03_sfnt_off0000a56f.bin
39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67
pdf-font-stream PDF embedded font (sfnt) at offset 0xA56F 16092 bytes