Malicious PDF — malware analysis report

Static analysis result for SHA-256 b06366ae5fd0ac1b…

MALICIOUS

PDF

42.8 KB Created: 2020-08-10 16:51:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e627750e772533d73182c65156c8084 SHA-1: 0f50219e02df8f349f50736d00941b8c1d1e208d SHA-256: b06366ae5fd0ac1b8209b0e824c11c5890e937b3231d40cd1f1a26c1cad2302c
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically 'https://ttraff.com/pify?keyword=dry+augusten+burroughs+pdf'. This indicates the document is designed to lure users to a potentially harmful website. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute malicious content. No scripts were extracted, but the primary attack vector appears to be the malicious URL embedded within the document.

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=dry+augusten+burroughs+pdf
    • http://files.katherinehelena.com/uploads/1/3/0/7/130776407/ee5020.pdf
    • http://files.freewheelingwriter.com/uploads/1/3/1/4/131452804/zafemuda.pdf
    • http://files.drgillory.com/uploads/1/3/0/8/130814390/josoru.pdf
    • http://files.personalpilatesma.com/uploads/1/3/1/4/131406785/bimamadejo_bufen.pdf
    • https://cdn.shopify.com/s/files/1/0434/0675/3948/files/salurarozudatapomevotut.pdf
    • https://cdn.shopify.com/s/files/1/0428/2014/1223/files/liwifeguxufuxigudokuza.pdf
    • https://cdn.shopify.com/s/files/1/0434/3850/6146/files/vmware_14_license_key.pdf
    • https://cdn.shopify.com/s/files/1/0432/3406/6600/files/gidejawuj.pdf
    • https://cdn.shopify.com/s/files/1/0432/2423/6199/files/27241415020.pdf
    • https://cdn.shopify.com/s/files/1/0435/5473/4241/files/74076208363.pdf
    • https://cdn.shopify.com/s/files/1/0433/5288/3352/files/1880746571.pdf
    • https://cdn.shopify.com/s/files/1/0440/1584/5541/files/cerfa_permis_de_construire.pdf
    • https://cdn.shopify.com/s/files/1/0434/0780/2518/files/algorithmic_trading_basic_to_advanced_strategies.pdf
    • https://cdn.shopify.com/s/files/1/0431/6649/8965/files/18959491835.pdf
    • https://cdn.shopify.com/s/files/1/0431/2537/5127/files/zojuda.pdf
    • https://cdn.shopify.com/s/files/1/0430/9906/2421/files/boarding_pass_lion_air.pdf
    • https://cdn.shopify.com/s/files/1/0428/4379/9719/files/fairy_armor_hypixel_skyblock.pdf
    • https://cdn.shopify.com/s/files/1/0434/1619/1138/files/46800270917.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_off000068e3.bin
576847825b3bb4db7c0070d0705a09a760bf7be89b6f9b0fa99ae470dd382062		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68E3 5512 bytes
font_01_sfnt_off00007b93.bin
ab5ae67160597c0eb016750c0ace7a2daa7c8750851dfffb99d4663e8bb1c750		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B93 10084 bytes

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