Malicious PDF — malware analysis report

Static analysis result for SHA-256 12000aa7997e5b85…

MALICIOUS

PDF

42.8 KB Created: 2020-08-26 01:47:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9bcb40ded098ad711a5016238a06a4b SHA-1: 06cae2c068c4704ef5897b66ced9f3b9de2248ea SHA-256: 12000aa7997e5b85734cc9740aebcdb3b5427ca14b8830074d62f34ad197a0de
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=general+ledger+template+free+downloa', is designed to redirect users to potentially harmful content. The presence of a 'download button' heuristic further supports the lure-based attack pattern. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.cc/pify?keyword=general+ledger+template+free+downloa
    • http://files.canyonwindfineart.com/uploads/1/3/0/8/130874030/aa6e9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/6697/3589/files/pixokonufasifo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3136/2725/files/precious_bait_sekiro.pdf
    • https://cdn.shopify.com/s/files/1/0431/3215/8116/files/b_v_ramana_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/6134/6466/files/5392954057.pdf
    • https://cdn.shopify.com/s/files/1/0427/4572/5094/files/wurudotizizeramelov.pdf
    • https://cdn.shopify.com/s/files/1/0431/1869/0458/files/alimentos_para_diabticos_e_hipertensos.pdf
    • https://cdn.shopify.com/s/files/1/0463/9073/9099/files/49347840911.pdf
    • https://cdn.shopify.com/s/files/1/0429/4295/5676/files/eve_battle_report.pdf
    • https://cdn.shopify.com/s/files/1/0433/7870/4536/files/61822182584.pdf
    • https://cdn.shopify.com/s/files/1/0434/8451/2406/files/wonino.pdf
    • https://cdn.shopify.com/s/files/1/0432/8043/3302/files/dotamobufewipow.pdf
    • https://cdn.shopify.com/s/files/1/0429/9217/3217/files/tovurajipukutisodilo.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d4a.bin
e89d9d634dbd87d99192b35cff4d69032efed3731ecd48dff79801fce8648967		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D4A 5048 bytes
font_01_sfnt_off00006e75.bin
e368a2f511d3c101889bc65f4f80397dadc15e85a7713c3a205247da30ccea4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E75 9988 bytes
font_02_sfnt_off0000906d.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x906D 4324 bytes

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