Malicious PDF — malware analysis report

Static analysis result for SHA-256 30b086d50f52332d…

MALICIOUS

PDF

41.0 KB Created: 2020-08-31 11:01:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4f8f85088d6e407e00a90c822c27aaa SHA-1: 410bbe070e3f6e6906291dd669c3950b913de99c SHA-256: 30b086d50f52332d521b6df8c06666cfec143b606879cb10eca7246706c5fe12
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a mass of external links, including a primary link to a known malicious redirector. The document body text, though garbled, contains the search query 'gnc body fat analyzer scale' and the malicious URL, suggesting a lure to a phishing or scam page. The ML classifier also strongly indicated maliciousness.

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/wix?keyword=gnc+body+fat+analyzer+scale
    • https://static.usrfiles.com/ugd/badafb_8641aeef1f6941c68596d1d97312fa1d.pdf
    • https://static.usrfiles.com/ugd/455f95_feaea2e75a254e309b23915727d298a2.pdf
    • https://static.usrfiles.com/ugd/49be48_fde169805ac043c9aeff4d2d8eed2eea.pdf
    • https://static.usrfiles.com/ugd/3615fb_6735b42a21444d67b1ee977e0ef3552b.pdf
    • https://cdn.shopify.com/s/files/1/0428/7440/5023/files/49079181628.pdf
    • https://cdn.shopify.com/s/files/1/0432/6254/1982/files/20324947004.pdf
    • https://static.usrfiles.com/ugd/b8c837_b1b84b64e421481cae97d9f4545d2187.pdf
    • https://static.usrfiles.com/ugd/b8c837_a69c188e6dac4e05bb7d09d2ebeec3c7.pdf
    • https://static.usrfiles.com/ugd/b8c837_72ac53d6de8341599f5dd0e21b817d39.pdf
    • https://cdn.shopify.com/s/files/1/0430/1049/0519/files/36211899903.pdf
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/kunaxuvolo.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000574b.bin
d70553f5e0a84d14f2218e7f61b075605b89507dcb6d6962704a6b216dddb72f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x574B 5340 bytes
font_01_sfnt_off0000698d.bin
3844fd14175af993ae9887d4603e2fb0c25be18a88c434d37c2497944a5a4c07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x698D 14792 bytes

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