Malicious PDF — malware analysis report

Static analysis result for SHA-256 301bd9138de075b8…

MALICIOUS

PDF

48.7 KB Created: 2020-08-15 07:25:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb31c7c367a17feb503a9e738f45aef8 SHA-1: 32cb86919c90efd641d12b563df762260c75d3b5 SHA-256: 301bd9138de075b8811a5f8acd7805144fd75742a3dbaba4f91da2cb88bec443
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 'https://ttraff.cc/pify?keyword=chirmi+ra+dala+char+rajasthani+song'. This URL is likely used to redirect users to malicious websites. The document also contains a large number of embedded links to other PDFs hosted on Shopify, suggesting a link farm for SEO poisoning or to obscure the primary malicious destination. The ML classifier also 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.cc/pify?keyword=chirmi+ra+dala+char+rajasthani+song
    • http://files.rabbitmountainlavender.com/uploads/1/3/0/7/130738625/futevukumuj_lulamatix_libujuferebetux.pdf
    • http://vozubat.wahunsenakah.org/uploads/1/3/0/7/130776873/mawil-fagiwexo-wozimekajavu.pdf
    • http://gunuzapev.csioboston.org/uploads/1/3/0/7/130740086/debb368a214.pdf
    • https://cdn.shopify.com/s/files/1/0432/3937/5012/files/tapigevoxujanunejejukeko.pdf
    • https://cdn.shopify.com/s/files/1/0438/4607/4525/files/92073767922.pdf
    • https://cdn.shopify.com/s/files/1/0431/6430/3522/files/rorasadejoj.pdf
    • https://cdn.shopify.com/s/files/1/0430/4768/2201/files/8879429783.pdf
    • https://cdn.shopify.com/s/files/1/0430/9850/5369/files/67752879460.pdf
    • https://cdn.shopify.com/s/files/1/0430/8844/5604/files/a_twist_in_my_story_album.pdf
    • https://cdn.shopify.com/s/files/1/0437/2201/4870/files/gimap.pdf
    • https://cdn.shopify.com/s/files/1/0434/2887/2359/files/nubopesupuzoromiven.pdf
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/arma_3_stratis_map.pdf
    • https://cdn.shopify.com/s/files/1/0428/2833/3212/files/82386767658.pdf
    • https://cdn.shopify.com/s/files/1/0430/6065/8333/files/fixid.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/92161478626.pdf
    • https://cdn.shopify.com/s/files/1/0431/7269/2122/files/alantoides_embriologia.pdf
    • https://cdn.shopify.com/s/files/1/0432/4930/3720/files/fejedelojob.pdf
    • https://cdn.shopify.com/s/files/1/0431/0558/3266/files/lisotunorikunowanukexu.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/
    • https://cdn.shopify.com/s/files/1/0437/2201/4870/file

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000617a.bin
b94c271d5dc96c7c0ae10c0eda84e66169a12430d61908fd92cdafaa9468347c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x617A 5332 bytes
font_01_sfnt_off00007373.bin
d171fb4e026bbc491fec9a27138889db78624526ed3a42f70152fe22669f1bcc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7373 14252 bytes
font_02_sfnt_off0000a058.bin
541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA058 16204 bytes

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