Malicious PDF — malware analysis report

Static analysis result for SHA-256 70b6c5f53f0d36e2…

MALICIOUS

PDF

101.7 KB Created: 2021-01-03 03:43:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8899b46d1e8f2f3d2df78699ab5fc378 SHA-1: b60745c52aa13a452231d8bcf3b548f5ecfdfd53 SHA-256: 70b6c5f53f0d36e2ecda11600bc16ed72a0cf50d22fec7e64db226996e86ec00
154 Risk Score

Malware Insights

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

The file is a PDF containing a link to a known malicious redirector, traffmen.ru. This indicates an attempt to lure the user to a malicious site, likely for phishing or to download further malware. The ML classifier and ClamAV detection strongly support its malicious nature. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffmen.ru/aws?utm_term=kannada+feeling+songs+old+free
    • https://cdn.sqhk.co/jawutuwek/j0jeVjd/pet_shop_of_horrors_daughter.pdf
    • https://cdn-cms.f-static.net/uploads/4376086/normal_5f8a83859faf1.pdf
    • https://cdn-cms.f-static.net/uploads/4415783/normal_5fa5f6b1361e9.pdf
    • https://cdn-cms.f-static.net/uploads/4374521/normal_5f8a5a771fdc8.pdf
    • https://cdn.sqhk.co/rifokinimito/XwRgjzV/5051208556.pdf
    • https://cdn.sqhk.co/vuramufef/YLXgN56/31592621608.pdf
    • https://cdn-cms.f-static.net/uploads/4500897/normal_5fb432cf6c1c1.pdf
    • https://cdn-cms.f-static.net/uploads/4474218/normal_5fa9a91b0d9ae.pdf
    • http://fedorahosted.org/lohit
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/remeranexe/98692499847.pdf
    • https://s3.amazonaws.com/baritexovopa/formal_letter_to_unknown_recipient.pdf
    • https://s3.amazonaws.com/jadere/benevolence_definition_kjv.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000111e9.bin
6d6ca381b920e3ad31d2605b7f2c6afca03d0253c06b09bff4dfac55abb53d0f		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x111E9 11556 bytes
font_00_sfnt_off0000da64.bin
acf42b66f181a9ebb58df58c83d301b49d4004c54dff180798fb7946dca3e203		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA64 12048 bytes
font_01_sfnt_off000101b9.bin
d84c80413ae0f2bdcef3f9c445959d38c39416c19f4bd7fb3cc1726e37aaa1ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101B9 4752 bytes
font_03_sfnt_off00012f40.bin
b64e28d496121764e973673b3becfba6c70475b388d2363c887bbc31284bc1d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F40 3560 bytes
font_04_sfnt_off00013d71.bin
ac12f2a4172eabeb15ff183dccb816fc764a5a53a36344af49a3906cef9d5ae6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13D71 11732 bytes
font_05_sfnt_off000165cf.bin
e619a639363efb8a8c499d9b10964d1cd014b9e04bc729d500f2b798c8236684		 pdf-font-stream PDF embedded font (sfnt) at offset 0x165CF 16076 bytes
font_06_sfnt_off00017a7e.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17A7E 4324 bytes

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