Malicious PDF — malware analysis report

Static analysis result for SHA-256 334cf5b3bb73609c…

MALICIOUS

PDF

54.2 KB Created: 2020-08-20 18:14:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e092c3878d5beab977c1cb44a17455b SHA-1: 48813d0223e2de7e0b628198452a9ebeb373ec94 SHA-256: 334cf5b3bb73609c91f93df6752df93ec44ad34de3282c738e978d954b5344aa
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 pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many hosted on 'cdn.shopify.com'. The document body, though heavily obfuscated, contains the same lure text and URL as the redirector link, strongly suggesting a social engineering attempt to drive traffic to malicious infrastructure.

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=fun+easy+brain+teasers+with+answers
    • http://files.awomanswords.com/uploads/1/3/1/6/131606331/vozoligugitasiluku.pdf
    • https://cdn.shopify.com/s/files/1/0437/9967/5040/files/89155280699.pdf
    • https://cdn.shopify.com/s/files/1/0430/9375/4009/files/zukatogotelenofurodofodu.pdf
    • https://cdn.shopify.com/s/files/1/0451/9349/4677/files/definition_of_anthropology_political_science_and_sociology.pdf
    • https://cdn.shopify.com/s/files/1/0432/8800/2710/files/blue_eyes_technology_download.pdf
    • https://cdn.shopify.com/s/files/1/0445/8138/8452/files/identity_malta_position_description_template.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/meragavafeduxilaxopuxaw.pdf
    • https://cdn.shopify.com/s/files/1/0434/3093/6733/files/zifojijobibivixez.pdf
    • https://cdn.shopify.com/s/files/1/0433/7156/1116/files/46452142111.pdf
    • https://cdn.shopify.com/s/files/1/0435/4621/4564/files/43375705251.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_off00009762.bin
aa4247cb36773ef147f7a37b5ba4b00a1a440e97b77eb6a299b755d76fe42511		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9762 5028 bytes
font_01_sfnt_off0000a88a.bin
c7ae37fc11888b324f363f6b79225e345abd0262885ff638d679f613c34811a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA88A 10356 bytes

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