Malicious PDF — malware analysis report

Static analysis result for SHA-256 508d580e5de79219…

MALICIOUS

PDF

42.6 KB Created: 2020-07-31 11:39:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d04b7bebb8493decdae4629b821e7d9 SHA-1: c9b93007223ff27ca3cf133b4ecd73deaed46100 SHA-256: 508d580e5de79219abd19d49267337f9157cf350884765f706803db44c511278
140 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to 'authorization letter for bank statement pdf'. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm designed to distribute malicious content. The heuristic 'SE_CALLBACK_LURE' further suggests a phishing or tech-support scam pretext.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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=authorization+letter+for+bank+statement+pdf
    • http://files.cbd-uk.shop/uploads/1/3/1/3/131379510/d566428890649.pdf
    • http://files.rachelteaglelpc.com/uploads/1/3/1/4/131406390/rogipenikamojivet.pdf
    • http://files.monkeymadnessfunbus.co.uk/uploads/1/3/0/7/130739264/merexiz-lajog.pdf
    • http://files.bbpregistry.com/uploads/1/3/0/9/130969051/1840320.pdf
    • http://files.monkeymadnessfu
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/13164506765.pdf
    • https://cdn.shopify.com/s/files/1/0437/9141/7505/files/99977023798.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/45366335679.pdf
    • https://cdn.shopify.com/s/files/1/0432/4284/8418/files/58654237115.pdf
    • https://cdn.shopify.com/s/files/1/0431/8406/2622/files/52639912466.pdf
    • https://cdn.shopify.com/s/files/1/0433/5511/1589/files/81492050515.pdf
    • https://cdn.shopify.com/s/files/1/0428/8439/9270/files/38896566602.pdf
    • https://cdn.shopify.com/s/files/1/0429/6497/5765/files/60141295512.pdf
    • https://cdn.shopify.com/s/files/1/0434/7337/1300/files/14068846906.pdf
    • https://cdn.shopify.com/s/files/1/0434/4935/2349/files/sisotuxi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/niwaxesajikibulunetegidu.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_off00006865.bin
1948602bf7ba9c756ecbfc4412a6ad6d64365d36acf55e594f63c250735b40e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6865 5404 bytes
font_01_sfnt_off00007a97.bin
8f5af07e6cdd511428d8af6eaf838c5dfc39483d964c19903372b8b115839d3a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A97 10004 bytes