Malicious PDF — malware analysis report

Static analysis result for SHA-256 c38fb0ff9b5a1558…

MALICIOUS

PDF

44.6 KB Created: 2020-08-24 19:42:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9315487499d2272ea8c2f0bd91584d9c SHA-1: bc4da5bf60b44a90306bc600d6a11ac296fb1839 SHA-256: c38fb0ff9b5a1558eae2891cdcb5ba8d75d89263b5af26672f71b5a80fa4979b
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO poisoning. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is presented in the document body as a resume cover letter template. This indicates a social engineering lure to drive traffic to malicious infrastructure.

Heuristics 3

  • 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.
  • 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=resume+cover+letter+template+word
    • http://files.windowreplacementframingham.com/uploads/1/3/0/8/130874582/jiropa_nulikit.pdf
    • http://files.safe-t-systems.net/uploads/1/3/1/8/131856247/sesaz.pdf
    • http://files.integratedpracticemodel.com/uploads/1/3/1/3/131379290/3bb5cf520c29df.pdf
    • http://zezatiz.anseasternwashington.org/uploads/1/3/1/4/131437987/xudasek.pdf
    • https://cdn.shopify.com/s/files/1/0436/6031/2741/files/rorajamiduxuwovasa.pdf
    • https://cdn.shopify.com/s/files/1/0431/2514/5760/files/47437050072.pdf
    • https://cdn.shopify.com/s/files/1/0431/0797/5335/files/6061318514.pdf
    • https://cdn.shopify.com/s/files/1/0428/2862/8124/files/exemple_de_cahier_de_charge_d_un_projet_de_construction.pdf
    • https://cdn.shopify.com/s/files/1/0434/6766/9654/files/tugibo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3156/8290/files/comunicazione_assertiva.pdf
    • https://cdn.shopify.com/s/files/1/0432/7417/4632/files/gulazawunagikururoborom.pdf
    • https://cdn.shopify.com/s/files/1/0440/8596/9046/files/82258652306.pdf
    • https://cdn.shopify.com/s/files/1/0428/6893/2767/files/zikup.pdf
    • https://cdn.shopify.com/s/files/1/0433/8660/1635/files/vunuvijogikibanov.pdf
    • https://cdn.shopify.com/s/files/1/0431/5624/2581/files/64893250723.pdf
    • https://cdn.shopify.com/s/files/1/0431/0951/5415/files/78399376315.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_off000063ce.bin
f48fa3f6196a09fdfbf0244110a410a2ee5c383fc61a7ecae33a24141f639bb6
pdf-font-stream PDF embedded font (sfnt) at offset 0x63CE 5104 bytes
font_01_sfnt_off00007544.bin
6a6746c071221b86d1494e38acfa2e0535a853a0342cb7e116a02b1691dde453
pdf-font-stream PDF embedded font (sfnt) at offset 0x7544 9960 bytes
font_02_sfnt_off00009744.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x9744 4324 bytes