Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab49a53be69c38c2…

MALICIOUS

PDF

46.3 KB Created: 2020-08-16 16:44:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c93e974374afb65a14eabd662ce1c1a4 SHA-1: 74e317e48bfed921256ec44bfff4f55da67f9a45 SHA-256: ab49a53be69c38c2d6bc8568edd660dd624f8c0671ba09e28be64af0183bb218
152 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically identified as a malicious redirector to 'https://ttraff.com/pify?keyword=reasons+students+should+not+wear+school+uniforms'. The document body, though heavily obfuscated, also contains this URL and other Shopify URLs, suggesting a lure to external content. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to harmful sites.

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=reasons+students+should+not+wear+school+uniforms
    • http://files.rawearth.ca/uploads/1/3/1/4/131438077/rakegetixokalokarap.pdf
    • http://poxalipub.mcdonaldband.com/uploads/1/3/1/3/131384169/segitozobos.pdf
    • http://nemikot.sjshsa.org/uploads/1/3/0/8/130814310/paxubesuzawugekaxib.pdf
    • http://ligotel.suffernwrestling.com/uploads/1/3/1/1/131164250/2782790.pdf
    • https://cdn.shopify.com/s/files/1/0433/6890/6906/files/tuvoleribigozoduvowug.pdf
    • https://cdn.shopify.com/s/files/1/0434/1799/3366/files/35471858038.pdf
    • https://cdn.shopify.com/s/files/1/0432/1896/0541/files/29781830158.pdf
    • https://cdn.shopify.com/s/files/1/0434/6318/0454/files/blender_2._80_reference_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/2758/6472/files/5514941466.pdf
    • https://cdn.shopify.com/s/files/1/0429/1395/6006/files/download_steven_universe.pdf
    • https://cdn.shopify.com/s/files/1/0433/9928/2845/files/english_abbreviation_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/5301/4423/files/tibubumajotisuwo.pdf
    • https://cdn.shopify.com/s/files/1/0436/0595/0626/files/nuwadozigexokaretezal.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_off00007746.bin
9564f4fb34563e275781c2eaf1504825bbf3bbcd3b4922bdb9176f6d9ffcb176
pdf-font-stream PDF embedded font (sfnt) at offset 0x7746 5360 bytes
font_01_sfnt_off00008963.bin
d19f380bf421662c47f0f6f4e9c17e8f8e6943ca467f24462a3639a1239445bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x8963 10012 bytes