Malicious PDF — malware analysis report

Static analysis result for SHA-256 46c51db84ab6c1e4…

MALICIOUS

PDF

45.6 KB Created: 2020-08-29 18:11:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 210d1875a3581f5f4d7def82213c544e SHA-1: 34f0c60455ca9231adcbcacb5d4cb2d615cd6287 SHA-256: 46c51db84ab6c1e41a71006530b282b501b641c1168937fc70585b9d6a4a206d
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, includes the URL 'https://ttraff.ru/wix?keyword=sloan+regal+urinal+keeps+running', suggesting a lure to a malicious site. The presence of numerous other links to Shopify-hosted PDFs indicates a link farm strategy, likely to improve SEO for malicious content. No scripts were extracted, and the primary malicious activity appears to be redirection.

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=sloan+regal+urinal+keeps+running
    • https://cdn.shopify.com/s/files/1/0429/5992/9503/files/skilled_occupation_list_australia_2020_17.pdf
    • https://cdn.shopify.com/s/files/1/0430/7763/2161/files/sofusaretunad.pdf
    • https://cdn.shopify.com/s/files/1/0432/0913/0143/files/elliott_hulse_advanced_5x5.pdf
    • https://cdn.shopify.com/s/files/1/0429/5393/2966/files/22930615688.pdf
    • https://cdn.shopify.com/s/files/1/0434/5649/5769/files/avira_antivirus_pro_android.pdf
    • https://cdn.shopify.com/s/files/1/0432/5982/2244/files/bloomberg_market_concepts_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0434/3198/5309/files/70601786110.pdf
    • https://cdn.shopify.com/s/files/1/0432/4252/0739/files/handbook_of_big_data_technologies_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/6179/6248/files/gokuzavi.pdf
    • https://cdn.shopify.com/s/files/1/0434/4751/7341/files/sikipipajomunozegeso.pdf
    • https://cdn.shopify.com/s/files/1/0438/2156/4066/files/gajajisejabasusejasodiw.pdf
    • https://cdn.shopify.com/s/files/1/0432/0608/2717/files/general_business_awareness.pdf
    • https://cdn.shopify.com/s/files/1/0427/4572/5094/files/bafotedenawoxela.pdf
    • https://cdn.shopify.com/s/files/1/0431/7570/6788/files/8882311506.pdf
    • https://cdn.shopify.com/s/files/1/0439/4303/5048/files/angels_in_america_play.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006832.bin
262145639010bf906189b098d8f4050adb2ebe5a78c111c2488e7051cecb897e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6832 4956 bytes
font_01_sfnt_off00007908.bin
750d470d8e32c5e9eaaf692a1b76d168a855118c81d29b1cc298802b9ac9ba77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7908 9980 bytes
font_02_sfnt_off00009b38.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B38 4324 bytes

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