Malicious PDF — malware analysis report

Static analysis result for SHA-256 65ebb0a10e2aa0c3…

MALICIOUS

PDF

42.4 KB Created: 2020-08-29 09:58:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f0644396facbf80a9d25d0114201067 SHA-1: 3d13d0409fe60f26581e931fbf1bfbfb682fa127 SHA-256: 65ebb0a10e2aa0c31d3a300e9d31a8d82573e5b90f4bd05f50a3d2f5e3dd85a6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'aroma digital rice cooker instructions' and the malicious URL, suggesting a lure for a phishing or malware distribution campaign. The presence of numerous external PDF links further indicates a link farm, a common tactic for SEO poisoning or distributing malicious content.

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.com/wix?keyword=aroma+digital+rice+cooker+instructions+6+cup
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/7604/3423/files/48139003436.pdf
    • https://cdn.shopify.com/s/files/1/0454/5445/9030/files/canadian_visa_lottery_2017_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0432/5788/8932/files/bumirerefawozokij.pdf
    • https://cdn.shopify.com/s/files/1/0432/0477/1999/files/pemenedipemanogurixobepow.pdf
    • https://cdn.shopify.com/s/files/1/0430/0242/9593/files/tomawi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7796/7776/files/xatuvureniruzojibabeze.pdf
    • https://cdn.shopify.com/s/files/1/0434/9601/3990/files/vizilipasosotemo.pdf
    • https://cdn.shopify.com/s/files/1/0448/3029/4177/files/angle_relationships_in_triangles_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/7405/9424/files/65640420298.pdf
    • https://static.usrfiles.com/ugd/b8c837_1f0e84610a424a37b2c93476c31e4dcd.pdf
    • https://static.usrfiles.com/ugd/b8c837_b1027e1c409843cc8dac9b69eacc9a7a.pdf
    • https://cdn.shopify.com/s/files/1/0437/7087/1970/files/mathswatch_adding_and_subtracting_fractions_answers.pdf
    • https://cdn.shopify.com/s/files/1/0447/7586/6519/files/zetarajowemasekunup.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/571475918.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/nudafobidarutisej.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000674f.bin
367cfd20eaa9aaa3aa3a0d9789399c0f44b368f4e2c2ee949120b444b2251715		 pdf-font-stream PDF embedded font (sfnt) at offset 0x674F 5600 bytes
font_01_sfnt_off00007a39.bin
7eeff6b3ad5fae787e88eed7bd87b834c752119de399208a259828fb821f6b7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A39 10048 bytes

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