Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b999ff94e1930f3…

MALICIOUS

PDF

45.1 KB Created: 2020-08-31 05:48:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8a1cc02c6cbf32d1ea4056e8ff90e28 SHA-1: a28041d01d0994ae16890aa9afab7cb3f127c1ea SHA-256: 6b999ff94e1930f39fb06c529048d1df041ccb85d9a90b6978cec667dd19c063
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one pointing to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains references to this redirector and a large list of other PDF links, suggesting a link farm or redirection scheme. The presence of a malicious redirector and the sheer volume of outbound links indicate a high likelihood of user redirection to 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=vampire+hunter+d+message+from+mars
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/3078/8758/files/lizavabafaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/0063/5290/files/what_is_igfxtray.pdf
    • https://cdn.shopify.com/s/files/1/0432/1103/0683/files/fastboot_flash_tools.zip_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/6448/2202/files/fawovowipesigededegino.pdf
    • https://cdn.shopify.com/s/files/1/0440/2891/9973/files/vapes.pdf
    • https://cdn.shopify.com/s/files/1/0434/5639/7464/files/vudekaridelifapomakakota.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/10464144588.pdf
    • https://cdn.shopify.com/s/files/1/0432/8967/3883/files/aiag_spc.pdf
    • https://static.usrfiles.com/ugd/b8c837_ec67cc3a1201451396d892e0c2da5cc6.pdf
    • https://static.usrfiles.com/ugd/921909_ab6e7b773caf4fd3b12c2143043692cd.pdf
    • https://static.usrfiles.com/ugd/a6e5e9_b710d7833c9b49bf8d62900df4314050.pdf
    • https://static.usrfiles.com/ugd/b5472a_b8c342ccbd7f4dd1b3757b65138269ba.pdf
    • https://cdn.shopify.com/s/files/1/0431/7557/5709/files/traductor_catalan_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0433/0464/8859/files/mupafanitiwosawukifa.pdf
    • https://cdn.shopify.com/s/files/1/0431/7249/5519/files/58040842474.pdf
    • https://cdn.shopify.com/s/files/1/0434/1586/3447/files/arm_microcontroller_tutorial_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0434/4204/5090/files/google_earth_3d_map_software_free.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_off000072c9.bin
39b3664ffccbb5baee22440ade80cdda7d26f0e5dee33959d99b94b1a078d2cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72C9 5388 bytes
font_01_sfnt_off000084fa.bin
971594f2ff9f871107eae50fadda7dfb75d165e20f1a128e3c557940d74a445a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84FA 10076 bytes

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