Malicious PDF — malware analysis report

Static analysis result for SHA-256 c94ec0f133a390bf…

MALICIOUS

PDF

43.0 KB Created: 2020-08-23 04:14:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61fb76c20c95f4d4759e81ef337e8594 SHA-1: a809368c455858a25b4ad4ca51a0ca772b806d87 SHA-256: c94ec0f133a390bf6213d73db43e0b86550ec9f709cb438114066ab4da412b2f
128 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=free+general+contract+for+services+template'. It also exhibits a link farm behavior, with numerous external PDF links, many hosted on Shopify. The document body, though partially corrupted, contains language suggesting a 'free general contract for services template' lure, aligning with the SE_INVOICE_LURE heuristic. The primary malicious IOC is the ttraff.com redirector, which likely leads to further malicious content.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.com/pify?keyword=free+general+contract+for+services+template
    • http://limasubo.senmccartney.com/uploads/1/3/0/8/130815017/juwew_redunol_tuketixomowet.pdf
    • http://lagotekip.menehunebasketball.com/uploads/1/3/2/3/132303382/f4dd37b925eb960.pdf
    • http://files.porthuronchurchofchrist.org/uploads/1/3/1/0/131070313/cb32fe472.pdf
    • http://files.waterboromarket.com/uploads/1/3/1/0/131070993/d21f27.pdf
    • https://cdn.shopify.com/s/files/1/0432/6883/3436/files/78131871480.pdf
    • https://cdn.shopify.com/s/files/1/0428/1974/8006/files/mastoiditis_aguda.pdf
    • https://cdn.shopify.com/s/files/1/0431/6463/1195/files/nugodewadurolexa.pdf
    • https://cdn.shopify.com/s/files/1/0431/6656/4503/files/35150611963.pdf
    • https://cdn.shopify.com/s/files/1/0437/4292/0869/files/79395060451.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9805/files/27220471529.pdf
    • https://cdn.shopify.com/s/files/1/0435/6292/6229/files/mokexoribekuzisapebavas.pdf
    • https://cdn.shopify.com/s/files/1/0428/7388/0739/files/lujeloninule.pdf
    • https://cdn.shopify.com/s/files/1/0435/0178/1156/files/skype_or_blackberry.pdf
    • https://cdn.shopify.com/s/files/1/0444/4412/3303/files/adairs_softest_cotton_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0429/1274/3591/files/xarakinom.pdf
    • https://cdn.shopify.com/s/files/1/0432/5038/5051/files/gujozezaliwibozurobugo.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_off00006a19.bin
8a8fd97b562f4e37298f6d5dcc5f4c8611f93855d52281691cfb2381812131aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A19 5352 bytes
font_01_sfnt_off00007c48.bin
93e7c348a3ef8e141e7f5626ed6726e26c9bf407526d8b281bbb4914f936458e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C48 10120 bytes