Malicious PDF — malware analysis report

Static analysis result for SHA-256 f66ed0b8ac53fea0…

MALICIOUS

PDF

37.2 KB Created: 2020-08-13 06:33:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e758b68052b295670149751d046e281 SHA-1: e8b7c53b2d819db2872419a439a7fc8a4ddc99d1 SHA-256: f66ed0b8ac53fea0abdb83df0737a0ae63135be7a33c689f0a632556c7df2d5b
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/pify?keyword=brothers+burger+menu+pdf'. This indicates the document's primary purpose is to redirect the user to a malicious site, likely for phishing or malware delivery. The presence of numerous other PDF links, as flagged by the PDF_SEO_LINK_FARM heuristic, further supports the attack pattern of using the document as a lure. No scripts were extracted from this sample, but the embedded URL is sufficient to classify the attack pattern.

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.com/pify?keyword=brothers+burger+menu+pdf
    • http://files.nechesengineers.com/uploads/1/3/2/6/132683017/2256902.pdf
    • http://files.nysfcja.org/uploads/1/3/1/6/131637169/sokidivibene.pdf
    • http://files.jordanslavish.com/uploads/1/3/1/3/131398406/0abdf.pdf
    • http://files.singlespark.nl/uploads/1/3/2/7/132741382/1a771236c.pdf
    • https://cdn.shopify.com/s/files/1/0433/7238/0318/files/the_economist_rss_feed.pdf
    • https://cdn.shopify.com/s/files/1/0451/3277/5589/files/maps_googleapis_com.pdf
    • https://cdn.shopify.com/s/files/1/0429/6874/4087/files/39017977439.pdf
    • https://cdn.shopify.com/s/files/1/0433/8866/6005/files/solidworks_electrical_black_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/17673355306.pdf
    • https://cdn.shopify.com/s/files/1/0434/5462/7993/files/zivobuxamazidolilonebexuw.pdf
    • https://cdn.shopify.com/s/files/1/0433/4341/3407/files/tavumezajozo.pdf
    • https://cdn.shopify.com/s/files/1/0432/0369/0660/files/java_generate_random_string.pdf
    • https://cdn.shopify.com/s/files/1/0429/5160/6435/files/togitewuvozoposo.pdf
    • https://cdn.shopify.com/s/files/1/0437/6009/1287/files/lirevevipu.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_off00004996.bin
8d2f1a11aabe35cde3d881bdd7eda448645fa75f8dcb13dad1ed3b46ead51486		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4996 5400 bytes
font_01_sfnt_off00005bd2.bin
7dea41977b2ac358d122ba1eb0b30a8d64f8682c9bc7285870df0b3827dcb3ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BD2 13500 bytes

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