Malicious PDF — malware analysis report

Static analysis result for SHA-256 99c25f12476a5681…

MALICIOUS

PDF

43.3 KB Created: 2020-07-28 06:41:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 604af2ca9be98a542b62f1fe4a3b598f SHA-1: 78f21fdd110f4bf512b15c79ce24797ead86d2a4 SHA-256: 99c25f12476a5681fc1762831a0727a141c3c41a74f59c77da66bf559f1f4af6
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains keywords related to applications and versioning, suggesting a lure. The presence of a PDF link farm heuristic further supports the attack pattern of redirecting users to external sites. No scripts were extracted from this sample.

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.ru/pify?keyword=airbrush+latest+version+app
    • http://files.thewildrosecountrystore.ca/uploads/1/3/0/7/130776120/wedevimijabo-demupafomowove-rifami.pdf
    • http://files.borderdentalstudygroup.org/uploads/1/3/0/8/130874627/6948eaa.pdf
    • http://files.designby-faith.com/uploads/1/3/1/1/131164202/golixil.pdf
    • http://files.svreunion.com/uploads/1/3/1/6/131636655/zomowuz.pdf
    • https://cdn.shopify.com/s/files/1/0429/7159/4911/files/98328207493.pdf
    • https://cdn.shopify.com/s/files/1/0431/8475/0741/files/kinizanejafiwunesu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0449/3987/files/mirinigi.pdf
    • https://cdn.shopify.com/s/files/1/0427/8213/0332/files/42236883397.pdf
    • https://cdn.shopify.com/s/files/1/0430/3906/4225/files/52038790538.pdf
    • https://cdn.shopify.com/s/files/1/0436/0660/5987/files/texepozodezawof.pdf
    • https://cdn.shopify.com/s/files/1/0437/9367/8497/files/10808877085.pdf
    • https://cdn.shopify.com/s/files/1/0429/5104/9370/files/mitawolegejeza.pdf
    • https://cdn.shopify.com/s/files/1/0433/0625/4494/files/gawozudunimejatiwika.pdf
    • https://cdn.shopify.com/s/files/1/0441/0041/9736/files/nitado.pdf
    • https://cdn.shopify.com/s/files/1/0428/8321/9619/files/mimovurapexokulizanagal.pdf
    • https://cdn.shopify.com/s/files/1/0430/3070/8385/files/lukokugatukekuv.pdf
    • https://cdn.shopify.com/s/files/1/0431/2127/9137/files/susitoxexipuzom.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_off00006bf8.bin
769f377405873a5725785e13089a21a8b95833e5c212792182be4891cfea1b29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BF8 4976 bytes
font_01_sfnt_off00007cd6.bin
1da83f12dde298d22dd0135680415cdb507b9e3380b2d9da12688b413a1f4396		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CD6 10352 bytes

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