Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6afe927c0531008…

MALICIOUS

PDF

40.9 KB Created: 2020-08-29 18:20:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2c4cc4ec17e14beb7dfbb1559f707508 SHA-1: 132db1f16c1903f7238610832f3508a33d89af81 SHA-256: f6afe927c053100843ddd72c11481cacd1adacc685d7d03267c35c0e7985c29f
154 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a redirector to a known malicious domain, ttraff.ru. The document body, though heavily obfuscated, contains text related to 'list of games with twitch integration' and the malicious URL, suggesting a lure to drive traffic to malicious infrastructure. The ML classifier strongly supports the malicious verdict.

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/wix?keyword=list+of+games+with+twitch+integration
    • https://cdn.shopify.com/s/files/1/0435/7400/1825/files/mesofora.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32773531818.pdf
    • https://cdn.shopify.com/s/files/1/0432/9763/6512/files/29956018436.pdf
    • https://cdn.shopify.com/s/files/1/0431/0895/8362/files/84676189021.pdf
    • https://cdn.shopify.com/s/files/1/0437/7831/0306/files/teatv_ios_apk.pdf
    • https://cdn.shopify.com/s/files/1/0431/3861/3415/files/netopojakezumijubavij.pdf
    • https://cdn.shopify.com/s/files/1/0436/5864/1561/files/43358778676.pdf
    • https://cdn.shopify.com/s/files/1/0434/9755/4084/files/drake_started_from_the_bottom_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0434/3509/8264/files/dubeluvusupowuki.pdf
    • https://cdn.shopify.com/s/files/1/0435/9664/4511/files/algebraic_proofs_crossword_puzzle_answers.pdf
    • https://cdn.shopify.com/s/files/1/0447/0797/1226/files/mowedot.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_off00006169.bin
224688228ab07993d038f52ef3378e2c993381aaadd7d2f109efd6504234dc66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6169 5296 bytes
font_01_sfnt_off00007361.bin
0f813d42e7d6a37757e213e0d05ffbff4d79817aed2be253fd1b4f37d99b245d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7361 10292 bytes

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