Malicious PDF — malware analysis report

Static analysis result for SHA-256 39a1ec831910c851…

MALICIOUS

PDF

59.9 KB Created: 2020-08-08 21:43:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 469bbc571a00d903a8c24c338a72aaf9 SHA-1: 90ce535c3fbce48f7a5e140486d6f2a29bf1775f SHA-256: 39a1ec831910c851aef94099e476a7e2c943debe0bee97a7cf4aeec209dd979d
120 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The primary malicious URL is https://ttraff.com/pify?keyword=complexity+of+all+searching+and+sorting+algorithms+pdf, which is likely intended to lead to further malicious content or phishing pages. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, suggesting a tactic to increase visibility or distribute malicious payloads.

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.com/pify?keyword=complexity+of+all+searching+and+sorting+algorithms+pdf
    • http://files.ashleydelapp.com/uploads/1/3/0/7/130738512/modujatobumixutepale.pdf
    • http://files.karmaindiatravel.com/uploads/1/3/0/7/130739919/640d942e8f1108.pdf
    • http://files.saradavisart.com/uploads/1/3/2/7/132710726/tiduxegumi_tateneloso_jegikaju_xidukulefawe.pdf
    • http://files.paullentzauthor.com/uploads/1/3/0/7/130775286/miwuzulapowika-fetogubexu-xonepi.pdf
    • https://cdn.shopify.com/s/files/1/0431/9805/4558/files/7747323755.pdf
    • https://cdn.shopify.com/s/files/1/0430/9568/7317/files/42849543289.pdf
    • https://cdn.shopify.com/s/files/1/0439/3612/0990/files/transfer_thunderbird_to_new_computer.pdf
    • https://cdn.shopify.com/s/files/1/0440/4235/4853/files/54700132767.pdf
    • https://cdn.shopify.com/s/files/1/0435/3084/6363/files/69_chevy_pick_up.pdf
    • https://cdn.shopify.com/s/files/1/0430/3545/9738/files/nefata.pdf
    • https://cdn.shopify.com/s/files/1/0432/3426/3199/files/mikeziwegulopovabesofafab.pdf
    • https://cdn.shopify.com/s/files/1/0429/5327/7603/files/biruxatuwosi.pdf
    • https://cdn.shopify.com/s/files/1/0427/6781/0726/files/borutadukamip.pdf
    • https://cdn.shopify.com/s/files/1/0427/9956/2911/files/29877646242.pdf
    • https://cdn.shopify.com/s/files/1/0432/8128/5286/files/49543045697.pdf
    • https://cdn.shopify.com/s/files/1/0438/8257/8088/files/blackfathom_villainy_horde.pdf
    • https://cdn.shopify.com/s/files/1/0428/3501/7895/files/7207682712.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_off000091f3.bin
5635f9ba610d47d61eb8e8a345156eb013ac2531376b066c12975359b66034f1
pdf-font-stream PDF embedded font (sfnt) at offset 0x91F3 5548 bytes
font_01_sfnt_off0000a4b6.bin
29df0c8476aabf4bc856cce51e246aaeacbaea996a241de3016e533bd7557c1b
pdf-font-stream PDF embedded font (sfnt) at offset 0xA4B6 14828 bytes
font_02_sfnt_off0000d399.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0xD399 4324 bytes