Malicious PDF — malware analysis report

Static analysis result for SHA-256 c13591da046e9baa…

MALICIOUS

PDF

68.8 KB Created: 2020-08-25 14:56:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 437e8467936dddd89c21c6924eb1f833 SHA-1: fe7fa396fc48f2a50bf208f0d94ec81ee479e125 SHA-256: c13591da046e9baa144829edda583435efed1aa2144119fc37468a36f67f2913
160 Risk Score

Malware Insights

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

The PDF file contains numerous links, identified as a link farm, designed to redirect users to malicious infrastructure. One such link, 'https://ttraff.ru/pify?keyword=hard+quiz+questions+and+answers', is flagged as malicious. The document body and heuristics indicate an advance-fee scam lure, suggesting the user is enticed with a quiz or prize to click the malicious link. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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.ru/pify?keyword=hard+quiz+questions+and+answers
    • http://files.millerlandscape.com/uploads/1/3/2/6/132680808/nuzemegalikam.pdf
    • http://began.patrickdonnellypoetry.com/uploads/1/3/1/4/131406082/38fc24.pdf
    • https://cdn.shopify.com/s/files/1/0431/1370/9725/files/jifewaxewikovinek.pdf
    • https://cdn.shopify.com/s/files/1/0431/2861/9168/files/horde_questing_guide_bfa.pdf
    • https://cdn.shopify.com/s/files/1/0427/7505/2454/files/42201805067.pdf
    • https://cdn.shopify.com/s/files/1/0428/9842/3967/files/69092584788.pdf
    • https://cdn.shopify.com/s/files/1/0440/7679/4021/files/wotibadozi.pdf
    • https://cdn.shopify.com/s/files/1/0428/2515/4716/files/67874820933.pdf
    • https://cdn.shopify.com/s/files/1/0434/6304/9376/files/whirlpool_duet_washer_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/1663/2992/files/leon_plus_anesthesia_machine.pdf
    • https://cdn.shopify.com/s/files/1/0462/6851/4453/files/pegugomuzulajiluratu.pdf
    • https://cdn.shopify.com/s/files/1/0463/2861/0971/files/embed_jasper_report_in_php.pdf
    • https://cdn.shopify.com/s/files/1/0431/0489/5143/files/galejukebu.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_off0000bc42.bin
8be95ba6de3afbfc85079886477f27af6a6bd2c3b9cd05266faf75953c8df294
pdf-font-stream PDF embedded font (sfnt) at offset 0xBC42 5016 bytes
font_01_sfnt_off0000cd74.bin
73862ae8a5614b5f9ccc726d980cb8f734b4eb8c2190d3f0b2f2b7bed56332cd
pdf-font-stream PDF embedded font (sfnt) at offset 0xCD74 10588 bytes
font_02_sfnt_off0000f18e.bin
a38b90a17f05938132fc526e9d4a309d49e481696ab613685b03074c5c9861c5
pdf-font-stream PDF embedded font (sfnt) at offset 0xF18E 16064 bytes