Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5c7caf7f11d3525…

MALICIOUS

PDF

46.8 KB Created: 2020-09-08 19:02:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e06806f07cecf3f9eca1fd16a37ca673 SHA-1: 858b8f29df877a98dd289ca6cbda4e7dc79e4a0f SHA-256: b5c7caf7f11d35252c6f4e5a57723686f15ce9344432b1df98cfbd4928d2df31
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.link/wix?keyword=cashew+processing+plant+project+report'. Additionally, it exhibits a PDF link farm, with many links hosted on cdn.shopify.com, suggesting an attempt to obscure the final malicious destination. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious redirector URL is sufficient to indicate a phishing or malware distribution attempt.

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.link/wix?keyword=cashew+processing+plant+project+report
    • https://cdn.shopify.com/s/files/1/0437/5032/6421/files/amor_de_verdade_video.pdf
    • https://cdn.shopify.com/s/files/1/0437/5874/7800/files/msci_emerging_markets_imi_index_fact_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/3111/7467/files/beginner_bodybuilding_workout.pdf
    • https://cdn.shopify.com/s/files/1/0431/6472/9512/files/bopoliwulupologuje.pdf
    • https://cdn.shopify.com/s/files/1/0435/4513/3207/files/3ds_max_2020_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/3787/6639/files/uniformly_accelerated_rectilinear_motion_equations.pdf
    • https://cdn.shopify.com/s/files/1/0433/1057/9865/files/civilization_vi_android.pdf
    • https://static.usrfiles.com/ugd/76de1a_7ec931b8e6a147e4a5c4502ec16a548d.pdf
    • https://static.usrfiles.com/ugd/31593d_c50dd2c107624a6f8f03a33f6f6d0da7.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/totavari.pdf
    • https://cdn.shopify.com/s/files/1/0429/2768/5799/files/dilakewugorabobemabudepa.pdf
    • https://cdn.shopify.com/s/files/1/0432/4284/8413/files/ap_gov_in_sachivalayam_hall_ticket.pdf
    • https://cdn.shopify.com/s/files/1/0431/6109/2255/files/nibonoxozedexup.pdf
    • https://cdn.shopify.com/s/files/1/0428/1014/6983/files/systematic_thinking_for_social_action.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_off00006b2f.bin
dd4c8b8d3cb633747025ad61b1d063a4386b638da4285aa87bc408320c1df1f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B2F 5176 bytes
font_01_sfnt_off00007cd7.bin
095562872c5a39c0cd13ffa87f1040112cf083e5a43c0eff4a005cdcd784381b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CD7 10400 bytes
font_02_sfnt_off0000a018.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA018 4324 bytes

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