Malicious PDF — malware analysis report

Static analysis result for SHA-256 bab3b6d438c31b44…

MALICIOUS

PDF

41.0 KB Created: 2020-08-14 11:35:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed480e999643154625dc5f9ab19b1768 SHA-1: b7d73e852707b0367fff9fab82f31bf10735cd56 SHA-256: bab3b6d438c31b446bfc69e21320844e6653bed8f0b6a89d3c3a263842eff445
162 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=unpack+bin+android'. This indicates the document is designed to redirect users to malicious infrastructure. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests the user is prompted to decrypt an archive, likely containing a secondary payload. The document body contains obfuscated text and the malicious URL, further supporting this attack pattern.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=unpack+bin+android
    • http://files.wwrecordings.com/uploads/1/3/0/7/130739690/fibumubawat.pdf
    • http://files.rcmcm.com/uploads/1/3/1/6/131637374/1866021.pdf
    • http://files.q8ti.net/uploads/1/3/1/4/131438571/248b3dc5fc.pdf
    • http://tekeki.fritzandmischelljewelry.com/uploads/1/3/1/3/131383483/f0a607b488b.pdf
    • http://files.copanelloentertainment.com/uploads/1/3/0/7/130738806/6839011.pdf
    • https://cdn.shopi
    • https://cdn.shopify.com/s/files/1/0431/2023/0564/files/how_to_be_an_effective_worship_leader.pdf
    • https://cdn.shopify.com/s/files/1/0430/8644/6746/files/physics_9th_class_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/81902141949.pdf
    • https://cdn.shopify.com/s/files/1/0429/6107/6375/files/99451912967.pdf
    • https://cdn.shopify.com/s/files/1/0433/3184/6296/files/sazibosiwadajotatesiti.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dojedeteremedadedarovir.pdf
    • https://cdn.shopify.com/s/files/1/0432/7440/3996/files/25708098193.pdf
    • https://cdn.shopify.com/s/files/1/0434/2572/6625/files/jamifipoxabarukotupojasig.pdf
    • https://cdn.shopify.com/s/files/1/0431/0433/8074/files/muvax.pdf
    • https://cdn.shopify.com/s/files/1/0432/1892/7779/files/piseraxeranonasev.pdf
    • https://cdn.shopify.com/s/files/1/0429/2126/3271/files/96148200370.pdf
    • https://cdn.shopify.com/s/files/1/0440/8092/2789/files/tresanti_adjustable_height_desk_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/2531/8563/files/berlin_criteria_ards.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_off00006364.bin
971d4a889fee7ea56a638276e6897e01ced99f67cd579c375511db3396311042
pdf-font-stream PDF embedded font (sfnt) at offset 0x6364 5052 bytes
font_01_sfnt_off00007496.bin
8aeb82889cb05919fded64264c22569f3f8ffc4e04b6761f60ff10819169b27d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7496 10192 bytes