Malicious PDF — malware analysis report

Static analysis result for SHA-256 dec18742535e7535…

MALICIOUS

PDF

40.2 KB Created: 2020-07-28 09:08:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 025bb3f50fd5432f5c96da0ea085b5ba SHA-1: afb029f2092d2b269f0cbb1ada9c065a719baff0 SHA-256: dec18742535e753580a7001c560a3d64d7a33daaa3ecd14c1e342c08c8685b1e
150 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains text related to 'Truecaller app' and 'google play store', suggesting a social engineering lure. The presence of numerous external PDF links further indicates a link farm strategy, likely to distribute malicious content or improve SEO for malicious sites.

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=truecaller+app+from+google+play+store
    • http://files.425sqn.org/uploads/1/3/0/8/130814642/zotazaboma.pdf
    • http://files.jessicadesautels.com/uploads/1/3/1/4/131406068/rivofizudapa.pdf
    • http://files.meridianbodycare.com/uploads/1/3/1/8/131857193/6976761.pdf
    • http://files.jomichellepro.com/uploads/1/3/2/7/132740553/wefekanulibof_pimumapek.pdf
    • http://files.jessicadesautels.com/uploads/1/3/1/4/131406
    • https://cdn.shopify.com/s/files/1/0431/4690/3701/files/vofetado.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/94608223162.pdf
    • https://cdn.shopify.com/s/files/1/0430/4571/6129/files/86604683743.pdf
    • https://cdn.shopify.com/s/files/1/0431/5847/0807/files/92236474248.pdf
    • https://cdn.shopify.com/s/files/1/0436/9688/1814/files/88133676518.pdf
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/pijivepisajop.pdf
    • https://cdn.shopify.com/s/files/1/0433/7929/4358/files/90721225015.pdf
    • https://cdn.shopify.com/s/files/1/0430/3532/8663/files/27464302418.pdf
    • https://cdn.shopify.com/s/files/1/0429/2270/5055/files/10304721871.pdf
    • https://cdn.shopify.com/s/files/1/0429/6966/1589/files/15960614010.pdf
    • https://cdn.shopify.com/s/files/1/0429/7038/2490/files/70285387546.pdf
    • https://cdn.shopify.com/s/files/1/0433/9875/8557/files/51740083091.pdf
    • https://cdn.shopify.com/s/files/1/0428/3822/9158/files/bupekafizoxizavur.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_off00005fee.bin
626b4170b1f875bea8918a0854a487c3b7ce6598ed4b8fcd9ee76c3a7163c411		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FEE 5112 bytes
font_01_sfnt_off00007167.bin
5b53cb6a56c42f8b51dc315a2e48bd4ef5387182dabf91be3346d24b8b753736		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7167 9948 bytes

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