Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d7175693e295436…

MALICIOUS

PDF

39.4 KB Created: 2020-08-10 22:53:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c88646dcf674c51655537bacc5b4ec2f SHA-1: 705977c4d7b4458c4ab280c42f672b5078fb400c SHA-256: 1d7175693e2954363df1fb503e774b2f9f906735695480a89bc36b87feef2703
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains numerous embedded links, many pointing to a link farm hosted on cdn.shopify.com, and one critical link to a known malicious redirector at ttraff.ru. This indicates a likely SEO poisoning or phishing attack, aiming to drive traffic to malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF.

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.ru/pify?keyword=gcse+biology+heart+exam+questions+pdf
    • http://files.teresele.com/uploads/1/3/0/7/130739340/1385744.pdf
    • http://files.undertheseattlemoon.com/uploads/1/3/1/3/131380850/gatupisowod-vuteweze.pdf
    • http://files.conlonlandscapinginc.com/uploads/1/3/0/7/130776542/69905e7122.pdf
    • http://buduxegu.purplegoosetogo.com/uploads/1/3/1/8/131856158/8fd0c4762.pdf
    • http://vafel.enakosovac.com/uploads/1/3/0/8/130813612/gawepi-wusux-dagoditalo-josopabogipis.pdf
    • https://cdn.shopify.com/s/files/1/0434/4968/0028/files/lijozaterumozaxer.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mozesuseb.pdf
    • https://cdn.shopify.com/s/files/1/0432/6942/3257/files/38783556511.pdf
    • https://cdn.shopify.com/s/files/1/0430/9280/3744/files/emotional_intelligence_research.pdf
    • https://cdn.shopify.com/s/files/1/0438/5472/5270/files/zavanedemokane.pdf
    • https://cdn.shopify.com/s/files/1/0429/7113/6154/files/69546157801.pdf
    • https://cdn.shopify.com/s/files/1/0435/3975/9255/files/nuwave_pro_plus_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/2656/9633/files/74829183967.pdf
    • https://cdn.shopify.com/s/files/1/0436/0473/8206/files/83081058094.pdf
    • https://cdn.shopify.com/s/files/1/0429/6792/4899/files/65986072056.pdf
    • https://cdn.shopify.com/s/files/1/0436/4845/0718/files/buwita.pdf
    • https://cdn.shopify.com/s/files/1/0431/4398/7361/files/huffingtonpost._com_section_politics.pdf
    • https://cdn.shopify.com/s/files/1/0432/6824/3624/files/liste_des_chaines_canalsat_panorama.pdf
    • https://cdn.shopify.com/s/files/1/0429/5314/6517/files/metal_carbonyl_complexes.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/
    • https://cdn.shopify.com/s/files/1/0431/4398/7361/files/huffingt

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d67.bin
808161c9daf036cbfc2c41df07b7f94bbab086a0e29410ed52e413c08e83a06f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D67 5920 bytes
font_01_sfnt_off0000615d.bin
96b54ad3e52cef67f7157dba55e783f73ca80ec9876ac17d20eadd0f3d88bda7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x615D 9588 bytes
font_02_sfnt_off0000823c.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x823C 4324 bytes

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