Malicious PDF — malware analysis report

Static analysis result for SHA-256 abfd9fdbc1f4762c…

MALICIOUS

PDF

43.4 KB Created: 2020-08-07 00:41:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1cee6a54b5f06436d96033574397e96a SHA-1: e9584aac43be2267b325437b5e5ab8bb74cf9e33 SHA-256: abfd9fdbc1f4762c8b8347e26278665fdd5a908a2e42fc6b7632a04a423862e0
128 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, disguised as a datasheet, redirects to a known malicious URL (ttraff.ru). The presence of a download button lure further supports the malicious intent. The document body, though heavily obfuscated, contains the malicious URL and appears to be an attempt to disguise the malicious link as a technical document.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=smd+electrolytic+capacitor+datasheet+pdf
    • http://files.netwerkpijnrevalidatie.com/uploads/1/3/1/0/131070375/51997fb6.pdf
    • http://files.lifeafternarc.com/uploads/1/3/1/3/131398308/topisitoxixu-setepig.pdf
    • http://files.mountdoraenvironment.org/uploads/1/3/2/6/132682820/7998205.pdf
    • https://cdn.shopify.com/s/files/1/0428/9114/9471/files/17667429795.pdf
    • https://cdn.shopify.com/s/files/1/0438/9509/5464/files/ascites_pathophysiology.pdf
    • https://cdn.shopify.com/s/files/1/0430/1642/1529/files/toefl_test_structure_and_written_expression.pdf
    • https://cdn.shopify.com/s/files/1/0431/0204/4316/files/31367002384.pdf
    • https://cdn.shopify.com/s/files/1/0434/7920/3992/files/26719312223.pdf
    • https://cdn.shopify.com/s/files/1/0434/1936/9639/files/wing_chun_techniques_manual.pdf
    • https://cdn.shopify.com/s/files/1/0448/1007/6321/files/altruism_research.pdf
    • https://cdn.shopify.com/s/files/1/0437/3220/5722/files/jofekivetiposelulinelulev.pdf
    • https://cdn.shopify.com/s/files/1/0431/2629/2634/files/76557863323.pdf
    • https://cdn.shopify.com/s/files/1/0434/0069/1862/files/50607426818.pdf
    • https://cdn.shopify.com/s/files/1/0431/0581/2629/files/sikorinowegipivabelewif.pdf
    • https://cdn.shopify.com/s/files/1/0431/2937/2832/files/71602239361.pdf
    • https://cdn.shopify.com/s/files/1/0432/9740/7126/files/56271227355.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_off00005e66.bin
a245ab9af812c602c8e4ab5df139500eb6384470bd96e891df0170411ce71f66
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E66 5600 bytes
font_01_sfnt_off0000714e.bin
43cfad7364896227ec537fc038ff3afc2cc8ca0fb487fad02239fa4ee2e4b8ed
pdf-font-stream PDF embedded font (sfnt) at offset 0x714E 10120 bytes
font_02_sfnt_off0000943a.bin
eed8c166a09d16a8216fa18e30a2b89bb0cf88ad71b7a26520e3a2b5b34f21ea
pdf-font-stream PDF embedded font (sfnt) at offset 0x943A 3060 bytes