Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9151bbe201653a6…

MALICIOUS

PDF

110.1 KB Created: 2020-07-30 12:56:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 262dd405cf4787ddb56bbe5cfd6472b3 SHA-1: 581029449f89ad1edf890af2ba6ffcf2c78d7616 SHA-256: a9151bbe201653a6e5ee558819c10b424fe9d27b2d9e24f8c14bad0fbf24ae5a
130 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that the link 'https://ttraff.ru/pify?keyword=bsac+endocarditis+pdf' leads to known malicious infrastructure. Additionally, the 'PDF_SEO_LINK_FARM' heuristic suggests a large number of external PDF links, with 'https://cdn.shopify.com/s/files/1/0433/7870/4536/files/76258832068.pdf' being a prominent example. The document body, though heavily obfuscated, contains keywords that might be used in social engineering lures. The primary attack vector appears to be directing users to malicious URLs.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=bsac+endocarditis+pdf
    • http://files.ncstrategicperformancesystems.com/uploads/1/3/1/3/131382700/zefovomovexiv.pdf
    • http://files.cornishhols.com/uploads/1/3/1/3/131383743/popilij-wevuposatutuf-luvavavibeg.pdf
    • http://files.wadelightheart.net/uploads/1/3/0/8/130873903/9da5f78661d81.pdf
    • http://files.mehanphoto.com/uploads/1/3/1/3/131383207/f79cfd0a6.pdf
    • http://files.summasportswear.com/uploads/1/3/1/4/131453807/118d8e22a22790b.pdf
    • https://cdn.shopify.com/s/files/1/0433/7870/4536/files/76258832068.pdf
    • https://cdn.shopify.com/s/files/1/0436/2380/9187/files/fijugagubiweb.pdf
    • https://cdn.shopify.com/s/files/1/0434/6911/1448/files/kemobegajixavewipeg.pdf
    • https://cdn.shopify.com/s/files/1/0429/3387/8940/files/wamolaxinusikuzijurixoda.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/78287634942.pdf
    • https://cdn.shopify.com/s/files/1/0433/1870/6341/files/fejaravogubudon.pdf
    • https://cdn.shopify.com/s/files/1/0437/1313/4757/files/34267784561.pdf
    • https://cdn.shopify.com/s/files/1/0431/2216/3876/files/nagejedabeguwusi.pdf
    • https://cdn.shopify.com/s/files/1/0436/4913/8846/files/lefufuzepiro.pdf
    • https://cdn.shopify.com/s/files/1/0428/1224/4134/files/1761301318.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_off00015bca.bin
3be96c86421300eb0e52919840969adcef694ae292109132a2149f8e5a4b6355
pdf-font-stream PDF embedded font (sfnt) at offset 0x15BCA 4952 bytes
font_01_sfnt_off00016ca1.bin
aa860931ed5f4951857b7d574910d544e931e77b8acbde83cd8f96060e257576
pdf-font-stream PDF embedded font (sfnt) at offset 0x16CA1 12584 bytes
font_02_sfnt_off0001954a.bin
43dd7310e986e37c0562d6efd2a67b6291a0d41fa892ecd43b306c3e7231f7b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x1954A 16148 bytes