Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c74a30a044ceb5d…

MALICIOUS

PDF

44.7 KB Created: 2020-08-14 16:09:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 44f990e30981c403753c3da8c88c3694 SHA-1: a2001aa704fb43ad52028e7e432ec4b3ba243660 SHA-256: 2c74a30a044ceb5d31dac9bdcf3b31572d6ca6e26e4136639b44141f11399e09
136 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one identified as a malicious redirector. The document body, though partially corrupted, suggests a lure related to educational content ('chemistry dimensional analysis worksheet'). The primary malicious link, https://ttraff.cc/pify?keyword=chemistry+dimensional+analysis+worksheet%2523+6+answers, likely serves as a gateway to further malicious content. The presence of a link farm heuristic further supports the malicious intent of distributing links.

Heuristics 5

  • 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
  • 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.cc/pify?keyword=chemistry+dimensional+analysis+worksheet%2523+6+answers
    • http://files.hotgandts.com/uploads/1/3/0/8/130813413/zavedevobufutopuso.pdf
    • http://files.susanbibulaphotography.com/uploads/1/3/1/3/131380612/poderuxogofizef_guludodet.pdf
    • http://xipil.ladiesinfirst.com/uploads/1/3/0/8/130814328/21b685dca90.pdf
    • http://senizif.sgkey.com/uploads/1/3/0/8/130813528/pafugedoterud-medirotuwaze-rikuvonipimag-xelufig.pdf
    • https://cdn.shopify.com/s/files/1/0436/9996/2024/files/91067625394.pdf
    • https://cdn.shopify.com/s/files/1/0447/2075/0745/files/sikatop_armatec_108.pdf
    • https://cdn.shopify.com/s/files/1/0451/8245/1861/files/78175438090.pdf
    • https://cdn.shopify.com/s/files/1/0436/1096/4131/files/fukefitidetobebawixu.pdf
    • https://cdn.shopify.com/s/files/1/0427/7728/0671/files/96014678692.pdf
    • https://cdn.shopify.com/s/files/1/0438/4414/1218/files/bacteremia_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0429/9633/4753/files/liwifisavuk.pdf
    • https://cdn.shopify.com/s/files/1/0432/5444/8286/files/zufajofuvidalilupax.pdf
    • https://cdn.shopify.com/s/files/1/0429/6481/1935/files/medifodivikexasigukuxi.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_off00007125.bin
3d5afc71a7802162b135ed72dcece1d4d594f522cd286682b7f0cb0a0a2daa0b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7125 5228 bytes
font_01_sfnt_off000082d7.bin
8e4df4e167251403f81fea1c5cc86b03964c251edc8fe7b119f0d15790850b47
pdf-font-stream PDF embedded font (sfnt) at offset 0x82D7 10280 bytes