Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa28b8d3f09e068a…

MALICIOUS

PDF

42.4 KB Created: 2020-08-31 08:39:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a389b287c7ed734a2f9edeb6f06511a5 SHA-1: 7690c6ce23dc5a4bce72c9280db0a7dc4afc0af0 SHA-256: aa28b8d3f09e068a0e0b6c9c865b04f867e8e6f9115ec83e73e3969b4e69b058
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, disguised as a calculator manual. This indicates a phishing or scam attempt. The PDF also contains a link farm pointing to numerous Shopify-hosted PDFs, likely for SEO manipulation to increase visibility. No scripts were extracted, but the presence of a malicious redirector and the document's deceptive content strongly suggest a phishing attack.

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.ru/wix?keyword=casio+fx-991es+plus+natural-v.p.a.m+manual
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/49181926903.pdf
    • https://cdn.shopify.com/s/files/1/0435/9585/8088/files/27009496272.pdf
    • https://cdn.shopify.com/s/files/1/0432/9350/7737/files/bible_study_on_forgiveness.pdf
    • https://cdn.shopify.com/s/files/1/0430/2385/9873/files/kimomegif.pdf
    • https://cdn.shopify.com/s/files/1/0439/4919/5419/files/circadian_cycle.pdf
    • https://cdn.shopify.com/s/files/1/0429/1385/7692/files/ropasegomujumemez.pdf
    • https://cdn.shopify.com/s/files/1/0447/0718/4793/files/25729629201.pdf
    • https://cdn.shopify.com/s/files/1/0429/5573/5203/files/59683779568.pdf
    • https://cdn.shopify.com/s/files/1/0433/9643/2021/files/kaththi_video_songs_mp4.pdf
    • https://cdn.shopify.com/s/files/1/0435/8671/5805/files/62676887551.pdf
    • https://cdn.shopify.com/s/files/1/0436/8079/2729/files/mevomojesidixarek.pdf
    • https://static.usrfiles.com/ugd/1b8612_6a8635371c18466e99ce9af271757247.pdf
    • https://static.usrfiles.com/ugd/d4da64_3c9b8f265f1e4591beed1e0c5800026a.pdf
    • https://static.usrfiles.com/ugd/f103bb_ec87f337831f431a8871e4d631659ebf.pdf
    • https://static.usrfiles.com/ugd/b8c837_1ea06ee8763242819b6ad57a77c297b8.pdf
    • https://static.usrfiles.com/ugd/b8c837_c692caf4a0a64d8ca1ba09c60602eacc.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_off000068d6.bin
522c182a73b94f42899b38455782e3d05ffe779a49621c90812537a772710adb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68D6 5352 bytes
font_01_sfnt_off00007b0a.bin
66cfe47af83f9d61a5468669b441ca0fd083a08f358225b22c333a65398b98a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B0A 9844 bytes

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