Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6d61095e272abb1…

MALICIOUS

PDF

38.7 KB Created: 2020-08-24 19:27:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9b57c9e66e982f291fd8180b648ee3e SHA-1: 0015f2b77597b2ee9072c4f4b4969f2639fefb27 SHA-256: f6d61095e272abb1f519f32cabe4dacc1070c2f06da6e1d4c93d964fdc0abe34
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.ru'. The document body, though heavily obfuscated, contains text related to 'Garfield 2004 tamil dubbed movie' and the malicious URL, suggesting a lure for users seeking entertainment content. The presence of a PDF link farm heuristic further indicates a malicious intent to distribute links. The ML classifier strongly flagged this PDF as malicious.

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/pify?keyword=garfield+2004+tamil+dubbed+movie
    • http://fuzod.professionalbusinessvaluers.com.au/uploads/1/3/1/4/131437375/xomuriven.pdf
    • https://cdn.shopify.com/s/files/1/0432/4913/9880/files/30656967449.pdf
    • https://cdn.shopify.com/s/files/1/0437/0310/7752/files/boxasakofasofe.pdf
    • https://cdn.shopify.com/s/files/1/0437/3449/9489/files/airmans_information_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/1021/8391/files/71826019135.pdf
    • https://cdn.shopify.com/s/files/1/0434/0344/4380/files/gukutetu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6146/8567/files/jegipazuvopu.pdf
    • https://cdn.shopify.com/s/files/1/0437/4642/7034/files/noziligugetibotepejaget.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/77439678162.pdf
    • https://cdn.shopify.com/s/files/1/0437/3286/1079/files/freeshop_no_title_keys_found.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_off00005963.bin
4bb1fa9ae0a38f930856248ce48524e31a6d9f00cc9e7dd187f7f0d0f8d439ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5963 5468 bytes
font_01_sfnt_off00006bf8.bin
3283dc21ae4f8b545f9050d1cdc73cec3c88750d9bfb022c59038d687e0f3f7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BF8 10076 bytes

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