Malicious PDF — malware analysis report

Static analysis result for SHA-256 01c3f0c5462758bc…

MALICIOUS

PDF

42.2 KB Created: 2020-08-05 11:28:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 911e7ed876eb435b366ed1f561c3bc15 SHA-1: b59998e3c1e4d4f9e5a6c0f7de352a8fe3c4e393 SHA-256: 01c3f0c5462758bc02b90fae7aeb60c6f5a2ff64ad4c76b5662a3202a7e5c2e8
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating it leads to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains URLs that are also present in the embedded link farm. This suggests a coordinated effort to drive traffic to malicious sites, likely for phishing or malware delivery.

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.cc/pify?keyword=cartooning+philosophy+and+practice+pdf
    • http://paxofuw.growingthroughlosstcsouth.com/uploads/1/3/1/4/131482962/f847416ec0a7fc.pdf
    • http://files.wilmingtonohw2020.com/uploads/1/3/1/0/131070612/wubenir.pdf
    • http://files.iknodomo.com/uploads/1/3/0/7/130738622/xufevabodimakisewi.pdf
    • http://files.chalkidiki-villas.com/uploads/1/3/1/4/131453193/bewaminaponasono.pdf
    • http://files.discoverelc.com/uploads/1/3/1/4/131438217/9028316.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/2969/2577/files/84011126405.pdf
    • https://cdn.shopify.com/s/files/1/0434/5489/0149/files/vizamomupar.pdf
    • https://cdn.shopify.com/s/files/1/0431/3258/4098/files/fisapusufezifa.pdf
    • https://cdn.shopify.com/s/files/1/0435/2301/4824/files/warcraft_roleplaying_game.pdf
    • https://cdn.shopify.com/s/files/1/0434/5459/5225/files/tarilatosaraxutuno.pdf
    • https://cdn.shopify.com/s/files/1/0431/3343/6066/files/24724013470.pdf
    • https://cdn.shopify.com/s/files/1/0434/5934/6599/files/wizegowofopokirar.pdf
    • https://cdn.shopify.com/s/files/1/0432/5064/7204/files/zaxone.pdf
    • https://cdn.shopify.com/s/files/1/0428/6588/5351/files/16143807381.pdf
    • https://cdn.shopify.com/s/files/1/0432/0945/7825/files/sizisupexepekufu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51220099535.pdf
    • https://cdn.shopify.com/s/files/1/0430/4555/2290/files/6813644006.pdf
    • https://cdn.shopify.com/s/files/1/0428/3046/3142/files/samezu.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006436.bin
aa1e0804919318d18cae289e3c37423a8c064260af026fdc69426c04137bbac1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6436 5424 bytes
font_01_sfnt_off000076ad.bin
f3317ada0e5f54a26dc1ccf64b2e910a8a351cbc8179e68f21e6e8443951bb10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76AD 10948 bytes

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