Malicious PDF — malware analysis report

Static analysis result for SHA-256 d01e674135d9a93e…

MALICIOUS

PDF

45.4 KB Created: 2020-07-10 03:42:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 13cb6cf88c29011acd91492816c3dd1e SHA-1: 1d6892d8311baaa030b6f818e275db01acdd79e4 SHA-256: d01e674135d9a93e434490c9a7c211825ded36881ecd698f7d43f03c16d4fb78
212 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, including a redirector link to ttraff.ru, and numerous links to other PDF files hosted on various domains. This suggests a link farm or SEO poisoning attack, likely intended to drive traffic or distribute further malware. The ClamAV detection and ML classifier strongly indicate malicious intent.

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.
  • ClamAV: Pdf.Dropper.Agent-9527257-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-9527257-0
  • 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.ru/wb?keyword=8%20week%20workout%20program%20pdf
    • http://files.loutildelapub.ca/uploads/1/3/0/7/130739662/nokofinafitomel-sevexowobixuxiv-xuponum.pdf
    • http://files.bpcrane.com/uploads/1/3/2/3/132303060/9883364.pdf
    • http://files.grey-music.com/uploads/1/3/2/8/132815004/3840468.pdf
    • http://files.pamelameans.com/uploads/1/3/1/3/131384249/6959627.pdf
    • http://files.markheggaircraft.com/uploads/1/3/1/3/131380998/13fbc841a385.pdf
    • http://files.dahammaak2k.com/uploads/1/3/0/9/130969673/gedidivofori.pdf
    • http://files.thecorpsridingclub.com/uploads/1/3/2/6/132681264/vowisuvepijujenog.pdf
    • http://files.ahikersview.com/uploads/1/3/2/6/132695489/8d866b944c8.pdf
    • http://files.donaldunger.com/uploads/1/3/1/3/131382491/8503527.pdf
    • http://files.restauranthibiscus.com/uploads/1/3/0/7/130776841/5106130.pdf
    • http://files.ironoakcanyonranch.com/uploads/1/3/1/4/131407361/9bba2a29.pdf
    • http://files.patriciagodden.com/uploads/1/3/1/4/131483019/5adf2.pdf
    • https://gunurineso.files.wordpress.com/2020/06/fiwalibu.pdf
    • https://vuketuwowi.files.wordpress.com/2020/06/70056591178.pdf
    • https://kemetax.files.wordpress.com/2020/06/18905394389.pdf
    • https://bamezedok238357191.files.wordpress.com/2020/06/bebivowiwi.pdf
    • https://samuzur.files.wordpress.com/2020/07/18984966774.pdf
    • https://vazomirawan.files.wordpress.com/2020/06/vubomamulubufabuzedos.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23929268289.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/41718344304.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zabaravoxetifup.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_off0000741b.bin
178328139cf1edfdf78f32c72e61d3255e702013593429ee58152189553db43c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x741B 5136 bytes
font_01_sfnt_off000085aa.bin
3c1065d91fc4c3c6f91a7e8e1b171a136fd7dad62633d258d17b078a6ac5ba61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85AA 10264 bytes

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