Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0faecd910e4b838…

MALICIOUS

PDF

48.6 KB Created: 2020-08-23 16:55:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f9afa310fab58ea5f38038e79c815b6 SHA-1: d5b5841106496daf49aa7b92ed0c67d9325b028d SHA-256: c0faecd910e4b83873ba101e52f805efc32d5d21c146bf491366713f32ccd373
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm heuristic, suggesting a large number of outbound links, with the first being to 'cdn.shopify.com'. The ML classifier also strongly flagged this PDF as malicious. The document body, though partially corrupted, contains the URL 'https://ttraff.com/pify?keyword=4411+formation+guide+fifa+18', reinforcing the malicious redirector finding.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=4411+formation+guide+fifa+18
    • http://files.warrenkaplan.com/uploads/1/3/0/9/130969709/cfbf0503e3.pdf
    • http://files.martindewittfinearts.com/uploads/1/3/1/3/131379213/zenanovulu_reder_wozevabimegob_fikedotekovonij.pdf
    • https://cdn.shopify.com/s/files/1/0437/7473/8586/files/zolonutixawukoti.pdf
    • https://cdn.shopify.com/s/files/1/0434/6282/0005/files/clinical_pharmacology_made_incredibly_easy_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/7113/6154/files/rabim.pdf
    • https://cdn.shopify.com/s/files/1/0429/3374/7878/files/47074794910.pdf
    • https://cdn.shopify.com/s/files/1/0430/7435/5351/files/94869993067.pdf
    • https://cdn.shopify.com/s/files/1/0435/0548/3942/files/qila_derawar_history_in_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0432/4953/3088/files/fojukoguga.pdf
    • https://cdn.shopify.com/s/files/1/0432/0555/8436/files/77736252318.pdf
    • https://cdn.shopify.com/s/files/1/0438/4597/6224/files/wetebafefu.pdf
    • https://cdn.shopify.com/s/files/1/0427/6797/4556/files/tizuzabikoriwinivalukada.pdf
    • https://cdn.shopify.com/s/files/1/0432/6542/5570/files/wijeken.pdf
    • https://cdn.shopify.com/s/files/1/0433/1814/9285/files/unblock_your_school_halo.pdf
    • https://cdn.shopify.com/s/files/1/0439/7914/5374/files/xewafudakenojudelami.pdf
    • https://cdn.shopify.com/s/files/1/0430/0180/6997/files/advancement_of_learning.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
stream_005_off00009806.bin
95afdc49531e271c289ed91bf18f0527c5b7346e02d05d74e5198f6ed40deb81		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9806 18756 bytes
font_00_sfnt_off0000642a.bin
306e2162e20859a35da3c15687b4683c56dcc544faef4bb854dd0a009f6687c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x642A 5256 bytes
font_01_sfnt_off000075f3.bin
2bc60086697a1221b442f11a4f37d4bbe02b18193c15dbaa546147e4c960fb8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75F3 9896 bytes

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