Malicious PDF — malware analysis report

Static analysis result for SHA-256 994463dd6c90ac95…

MALICIOUS

PDF

46.3 KB Created: 2020-08-25 03:15:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed7732a8abcee8427ffb72f3e52e9f31 SHA-1: 612eabe16b40fd72844ede8eb9a69d1ef2143dda SHA-256: 994463dd6c90ac95aecc95ff39161f72f56bb765742b72c3bbfe30721d20d605
154 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=cymera+camera+photo+editor+for+android`. This URL is presented within the document body, suggesting a lure to trick users into clicking it. The PDF also contains a large number of external links, many hosted on `cdn.shopify.com`, which is flagged as a link farm. The ML classifier strongly indicates maliciousness. The primary attack pattern involves redirecting the user to malicious infrastructure via the embedded link.

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=cymera+camera+photo+editor+for+android
    • http://tenudojot.ratatatstats.com/uploads/1/3/1/3/131380005/1207958.pdf
    • http://tubebo.mykingwoodtherapist.com/uploads/1/3/1/4/131454029/5579258.pdf
    • https://cdn.shopify.com/s/files/1/0430/4915/6757/files/webivixo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dojedeteremedadedarovir.pdf
    • https://cdn.shopify.com/s/files/1/0439/8238/9406/files/44960321108.pdf
    • https://cdn.shopify.com/s/files/1/0428/1715/9335/files/vogukep.pdf
    • https://cdn.shopify.com/s/files/1/0427/9074/8316/files/woveviduzekekarexabuluku.pdf
    • https://cdn.shopify.com/s/files/1/0432/2331/8686/files/guide_michelin_paris_2018.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96951977507.pdf
    • https://cdn.shopify.com/s/files/1/0437/5881/3341/files/best_e_readers_fors.pdf
    • https://cdn.shopify.com/s/files/1/0432/6293/5200/files/belt_bucket_elevator.pdf
    • https://cdn.shopify.com/s/files/1/0431/4585/5137/files/arya_samaj_havan_book_in_sanskrit.pdf
    • https://cdn.shopify.com/s/files/1/0434/1471/6572/files/vidmate_hd_video_2018_free.pdf
    • https://cdn.shopify.com/s/files/1/0439/2209/6283/files/charlie_s_angels_soundtrack.pdf
    • https://cdn.shopify.com/s/files/1/0437/7578/7169/files/philadelphia_experiment_book.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_off0000617a.bin
015bc2d92cb7745fa46027bee57a934d0b9bb5fcd417e15c8d6e4658dd198116		 pdf-font-stream PDF embedded font (sfnt) at offset 0x617A 5192 bytes
font_01_sfnt_off000072fe.bin
fc5e1de332c2e1eab2717e3477604f6b13ed77d3aec34d0cf2b0c5ba6855da17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72FE 10384 bytes
font_02_sfnt_off000096c6.bin
78b2f08628a3d196c252bd52f69b70ef54324ea9e3cd51effc42269334029ccf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96C6 16292 bytes

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