Malicious PDF — malware analysis report

Static analysis result for SHA-256 f66ae0c491f03853…

MALICIOUS

PDF

33.2 KB Created: 2020-08-11 05:18:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cdd274a771ce641459fa998e9f3e8905 SHA-1: 55ccc0e051e849f30efec4044db224a38d5f1b2e SHA-256: f66ae0c491f03853c4b84f31d7fe808a1c943677319f7b7937e4abd3faa2491b
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a malicious redirector at 'https://ttraff.ru/pify?keyword=wordly+wise+book+7+lesson+6+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting a lure to a malicious site. The presence of a large number of external PDF links further indicates a link farm or redirection strategy.

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=wordly+wise+book+7+lesson+6+pdf
    • http://tamode.mybodymysoul.org/uploads/1/3/0/7/130739678/2126833.pdf
    • http://rodud.stephanielin.co/uploads/1/3/1/3/131384424/wisufarakerapelega.pdf
    • http://files.localdmvhomes.com/uploads/1/3/1/4/131453214/9425275.pdf
    • https://cdn.shopify.com/s/files/1/0432/2571/0750/files/bijuxaruwesudoluwixafiga.pdf
    • https://cdn.shopify.com/s/files/1/0430/0180/7007/files/vinoxesalimopologoj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/59022585862.pdf
    • https://cdn.shopify.com/s/files/1/0430/2258/1923/files/zapuxowipameritiradomete.pdf
    • https://cdn.shopify.com/s/files/1/0434/4430/6086/files/decode_base64_javascript.pdf
    • https://cdn.shopify.com/s/files/1/0431/1266/1152/files/10424166336.pdf
    • https://cdn.shopify.com/s/files/1/0430/8670/8893/files/kopedomamefunovogiwavo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5045/8520/files/6032105608.pdf
    • https://cdn.shopify.com/s/files/1/0434/3581/9173/files/gogoxejilisopiwopika.pdf
    • https://cdn.shopify.com/s/files/1/0450/2195/4206/files/orculo_manual_y_arte_de_la_prudencia_baltasar_gracin.pdf
    • https://cdn.shopify.com/s/files/1/0430/2834/9085/files/3528286813.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zejakepujubuk.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_off000046cf.bin
d2035e1bdcccb546dc075a60d4c64b34d83717ddaf568401ebedff416554964b
pdf-font-stream PDF embedded font (sfnt) at offset 0x46CF 5472 bytes
font_01_sfnt_off0000599d.bin
651caca0375ce4463f75ea32287e2b9dd1f1decc5d62905f85efa2b5572590d0
pdf-font-stream PDF embedded font (sfnt) at offset 0x599D 8864 bytes