Malicious PDF — malware analysis report

Static analysis result for SHA-256 cea662f6f9a5794b…

MALICIOUS

PDF

48.3 KB Created: 2020-08-11 05:08:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76ae0796f0f0e7646579fd3a2c16e66a SHA-1: 139eb65a56e370ee5c40033fce56f646e59817b2 SHA-256: cea662f6f9a5794b4ced62b352b14cbc674d3593fa9db6c11d06a0b0828860c5
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one heuristic identifying it as a PDF link farm. The primary link, 'https://ttraff.ru/pify?keyword=apa+itu+anxiety+disorder+pdf', is flagged as malicious and likely serves as a redirector. The document body, though partially corrupted, contains text related to 'anxiety disorder pdf' and the tool 'wkhtmltopdf', suggesting a lure to disguise the malicious intent. The presence of numerous links, including the malicious redirector, indicates a phishing or social engineering attack.

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=apa+itu+anxiety+disorder+pdf
    • http://files.heathmereprimary.org/uploads/1/3/1/8/131856827/1425991.pdf
    • http://files.natureimprintedphotography.com/uploads/1/3/1/4/131438427/52b4869a85f27ae.pdf
    • http://tozezikor.hceaproud.com/uploads/1/3/2/7/132710712/fupotuwi-felefirib-sosux-kakoge.pdf
    • https://cdn.shopify.com/s/files/1/0437/0271/4533/files/jiravugerijobonisol.pdf
    • https://cdn.shopify.com/s/files/1/0429/0763/1779/files/44237938751.pdf
    • https://cdn.shopify.com/s/files/1/0435/1610/0776/files/ata_taekwondo_forms.pdf
    • https://cdn.shopify.com/s/files/1/0433/7605/0330/files/63983358427.pdf
    • https://cdn.shopify.com/s/files/1/0428/0870/5187/files/91479749633.pdf
    • https://cdn.shopify.com/s/files/1/0433/7631/2478/files/duzavuvupadowofewer.pdf
    • https://cdn.shopify.com/s/files/1/0434/3637/6214/files/vukokirisuzurevadiv.pdf
    • https://cdn.shopify.com/s/files/1/0435/6043/5871/files/32771831272.pdf
    • https://cdn.shopify.com/s/files/1/0439/8268/4318/files/21373661382.pdf
    • https://cdn.shopify.com/s/files/1/0432/0113/4747/files/pijexem.pdf
    • https://cdn.shopify.com/s/files/1/0440/2456/1829/files/dostoevsky_the_brothers_karamazov.pdf
    • https://cdn.shopify.com/s/files/1/0431/7783/6703/files/asset_allocation.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_off0000802f.bin
d78e7cdd8139cb55097c1a845189d75ae0c35a489ff36979e834f523bc31d21f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x802F 5164 bytes
font_01_sfnt_off000091db.bin
97e67a61ef36346fb4e88a8bfe0e7779797811583b5a13f082a4589474f456f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91DB 10208 bytes

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