Malicious PDF — malware analysis report

Static analysis result for SHA-256 f73f68d8b6f666b5…

MALICIOUS

PDF

41.3 KB Created: 2020-08-18 17:21:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7041084981042175d2e1ecae08e8591c SHA-1: 63d0bd51c0fa69346f5b3512abad527c33f3e545 SHA-256: f73f68d8b6f666b577196e2350fe0c3baf226ac4b6de095c1fcfba4fb7b8de63
160 Risk Score

Malware Insights

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

The PDF file contains a lure for an advance-fee scam, disguised as trivia questions, which is a common tactic for phishing. It embeds numerous links, including one to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=american+history+trivia+with+answers' which is likely intended to lead the user to a malicious site. The presence of a link farm further suggests malicious intent.

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=american+history+trivia+with+answers
    • http://files.wightmantennis.org/uploads/1/3/1/4/131437194/vonodafemaxoda.pdf
    • http://files.luxeavie.net/uploads/1/3/1/0/131069950/niboxidijaza.pdf
    • https://cdn.shopify.com/s/files/1/0431/0361/7173/files/rurijukur.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54748680829.pdf
    • https://cdn.shopify.com/s/files/1/0431/2884/8538/files/wobovipimelagagivigik.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/38935964995.pdf
    • https://cdn.shopify.com/s/files/1/0433/8050/6785/files/61256889526.pdf
    • https://cdn.shopify.com/s/files/1/0431/3920/3229/files/dibujo_arquitectonico_simbologia.pdf
    • https://cdn.shopify.com/s/files/1/0429/9181/2767/files/brain_teaser_interview_questions_answers.pdf
    • https://cdn.shopify.com/s/files/1/0439/1275/7400/files/41613892469.pdf
    • https://cdn.shopify.com/s/files/1/0430/0341/2633/files/maxodonotafezo.pdf
    • https://cdn.shopify.com/s/files/1/0440/6280/2085/files/ragageku.pdf
    • https://cdn.shopify.com/s/files/1/0431/5935/5558/files/gb_whatsapp_app_store.pdf
    • https://cdn.shopify.com/s/files/1/0434/4433/8838/files/application_of_priority_queue_in_data_structure.pdf
    • https://cdn.shopify.com/s/files/1/0433/4085/7494/files/technical_difficulties_tab.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_off00006277.bin
38e80a06f59f60de5b24e6730c053a12ffc7b361c9f4cf36a1f33f53fee27d42
pdf-font-stream PDF embedded font (sfnt) at offset 0x6277 5248 bytes
font_01_sfnt_off0000742e.bin
b4310f11da337c43e749c14c2d27873adc8a66007fd48b38286788c0ea2ed678
pdf-font-stream PDF embedded font (sfnt) at offset 0x742E 10500 bytes