Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e2542cbea96b7e2…

MALICIOUS

PDF

123.2 KB Created: 2020-08-04 23:55:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 764a32dc8c84d07e84366d8daecf44e2 SHA-1: 850236969345968cddbea242b4821554debb614c SHA-256: 9e2542cbea96b7e2dbdf1eef046f5087af2dc4d0f6cc3451b7dbc22933e429d9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, 'https://ttraff.cc/pify?keyword=vocabulary+for+ielts+pdf+collins', is identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'vocabulary for ielts pdf collins', suggesting a lure to entice users to click the malicious link. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' further supports that this is a social engineering attempt.

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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=vocabulary+for+ielts+pdf+collins
    • http://files.tradertscraftworks.com/uploads/1/3/0/7/130775465/a8e895.pdf
    • http://files.axxonkorea.com/uploads/1/3/1/0/131070506/duvamokoj_midegurakufi_xaxewovon_bezow.pdf
    • http://files.rightagri.com/uploads/1/3/1/8/131871687/8efc99bbbe655e0.pdf
    • http://files.tipifarfelu.com/uploads/1/3/1/4/131453171/fotovijabe.pdf
    • https://cdn.shopify.com/s/files/1/0430/4420/8797/files/8730277718.pdf
    • https://cdn.shopify.com/s/files/1/0431/5725/8395/files/57707644470.pdf
    • https://cdn.shopify.com/s/files/1/0430/9109/9805/files/jakota.pdf
    • https://cdn.shopify.com/s/files/1/0431/4038/2882/files/86382060274.pdf
    • https://cdn.shopify.com/s/files/1/0431/8514/3969/files/ziviwakenupilofu.pdf
    • https://cdn.shopify.com/s/files/1/0440/4799/0934/files/nekizinakegoduz.pdf
    • https://cdn.shopify.com/s/files/1/0436/0280/4898/files/65369978533.pdf
    • https://cdn.shopify.com/s/files/1/0431/2308/1378/files/51333262836.pdf
    • https://cdn.shopify.com/s/files/1/0428/8974/0441/files/tuvedesulabataminoz.pdf
    • https://cdn.shopify.com/s/files/1/0433/1339/7913/files/70864900596.pdf
    • https://cdn.shopify.com/s/files/1/0435/9569/4239/files/20682572959.pdf
    • https://cdn.shopify.com/s/files/1/0432/2535/0306/files/87500402437.pdf
    • https://cdn.shopify.com/s/files/1/0449/5425/5515/files/ssa_561_u2.pdf
    • https://cdn.shopify.com/s/files/1/0440/9350/5688/files/19298494737.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_off0001a08c.bin
a2f0ac0684fc7978deffc35c280728880d0fc04cc5d60128202d312f1d5d47d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A08C 5356 bytes
font_01_sfnt_off0001b2d4.bin
e103a259497c0fc3fd9d1421bda5b58a3c5f2f71d2e382667eb162b783056d79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B2D4 14200 bytes

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