Malicious PDF — malware analysis report

Static analysis result for SHA-256 536211dce37b8f36…

MALICIOUS

PDF

37.6 KB Created: 2020-07-28 18:42:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dffbf1a3e1338a8a64ed8cea1ea474c1 SHA-1: 2d15ab7e0661e45838cb479b98a9e238b06ab371 SHA-256: 536211dce37b8f36f817423b80d537723db09e463c5dc1794071a1c90a8c39ce
130 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, appears to contain text related to 'Alms army information security training', suggesting a lure to entice users to click the malicious link. The presence of a link farm further indicates an attempt to distribute content or malware through a network of linked PDFs.

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.cc/pify?keyword=alms+army+information+security+training
    • http://files.workingmolossersunited.com/uploads/1/3/0/7/130739603/tuwiwefazuwatiboweb.pdf
    • http://files.nileshsp.com/uploads/1/3/1/8/131871625/07cf401a3ea82b.pdf
    • http://files.adewaleadeyeyeauthor.com/uploads/1/3/0/8/130874115/6343663.pdf
    • https://cdn.shopify.com/s/files/1/0438/0501/6226/files/15368629679.pdf
    • https://cdn.shopify.com/s/files/1/0436/0699/9203/files/dopus.pdf
    • https://cdn.shopify.com/s/files/1/0431/4038/2882/files/sepiladubud.pdf
    • https://cdn.shopify.com/s/files/1/0431/4932/8533/files/voxonabi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/77603652905.pdf
    • https://cdn.shopify.com/s/files/1/0432/5782/3390/files/54062858146.pdf
    • https://cdn.shopify.com/s/files/1/0429/0789/3919/files/21108184830.pdf
    • https://cdn.shopify.com/s/files/1/0435/4893/4295/files/32866925320.pdf
    • https://cdn.shopify.com/s/files/1/0431/7410/1149/files/7447970689.pdf
    • https://cdn.shopify.com/s/files/1/0432/5752/8480/files/bewituzoxun.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/20675343362.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/
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/7760365290

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005606.bin
a8cc0c7a4014bdccdc6f8120b0c5f332c1c982995fc25462e7d100615fec1eed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5606 5176 bytes
font_01_sfnt_off0000678c.bin
0af080330f6903a602a825b382fcedf76c2e7073c36e1c3f11025fae52e45d90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x678C 9820 bytes

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