Malicious PDF — malware analysis report

Static analysis result for SHA-256 a16f3683dff848f3…

MALICIOUS

PDF

40.5 KB Created: 2020-09-12 21:50:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 023049192b53d5eb2c2b055d510b36d5 SHA-1: 9d36ef0680792eae18fcaa8433563ac9ffa90c84 SHA-256: a16f3683dff848f3a57beaac1e6d9e4caf0907fb249040da61e931b5b09156d4
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. This indicates a likely attempt to lead the user to a malicious site, possibly for phishing or to download further malware. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.me/pify?keyword=lil+abner+movie+dvd
    • http://files.mrfhistory.com/uploads/1/3/0/7/130776118/9052718.pdf
    • http://files.defriesgardens.com/uploads/1/3/0/7/130738806/lugexebavaxi.pdf
    • http://files.allenwarnerphoto.com/uploads/1/3/1/6/131607163/de2d380.pdf
    • https://cdn.shopify.com/s/files/1/0439/2864/9896/files/age_of_empire_3_cheats.pdf
    • https://cdn.shopify.com/s/files/1/0431/8248/9762/files/misonugewigojuvis.pdf
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/daworisubutu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9132/0229/files/digital_transformation_report.pdf
    • https://cdn.shopify.com/s/files/1/0432/8649/5396/files/44007379293.pdf
    • https://cdn.shopify.com/s/files/1/0436/0906/3586/files/lanekalivefudexe.pdf
    • https://cdn.shopify.com/s/files/1/0431/3110/9540/files/13149363988.pdf
    • https://cdn.shopify.com/s/files/1/0429/5743/9129/files/python_tutorial_point_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0432/8649/5397/files/satupawoxaz.pdf
    • https://cdn.shopify.com/s/files/1/0432/6703/1200/files/20690195128.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_off0000616b.bin
56a4eb8776a146d3694aa042e3b7bcbafe4b21b6d8eca30b4b3d25381b43d0d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x616B 4932 bytes
font_01_sfnt_off0000721e.bin
f7316300d863d1a2e0afdd67aaf49521fd8daec9e4ccd6025bad9f6d2b2eb4e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x721E 10372 bytes

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