Malicious PDF — malware analysis report

Static analysis result for SHA-256 707751788029535e…

MALICIOUS

PDF

38.4 KB Created: 2020-08-30 23:45:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7878b34a38a8e2d9261d19c633a3d1d4 SHA-1: 3d7bde87307a21161b4602062964bb1789821eae SHA-256: 707751788029535e015b97ffdd5e2de3b4cb3ac58414e30b42a7a3ad8221296e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text fragments and URLs that suggest a lure, specifically mentioning 'prayer request form' and linking to a redirector. The presence of numerous external PDF links, many hosted on Shopify, indicates a potential link farm or content stuffing technique to obscure the malicious intent. The ML classifier also strongly flagged this PDF as malicious.

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=prayer+request+form
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/2718/5311/files/political_map_of_europe_blank.pdf
    • https://cdn.shopify.com/s/files/1/0429/1146/5638/files/15865204263.pdf
    • https://cdn.shopify.com/s/files/1/0432/1430/7496/files/32685267086.pdf
    • https://cdn.shopify.com/s/files/1/0446/6507/7913/files/fezufiwedogelozusagefojid.pdf
    • https://cdn.shopify.com/s/files/1/0440/1872/9125/files/canadian_food_inspection_agency_contact_information.pdf
    • https://cdn.shopify.com/s/files/1/0439/1036/5339/files/polar_cylindrical_and_spherical_coordinates.pdf
    • https://cdn.shopify.com/s/files/1/0430/6649/1041/files/12097089519.pdf
    • https://cdn.shopify.com/s/files/1/0434/3159/2102/files/ffxi_leveling_guide_1-_99.pdf
    • https://static.usrfiles.com/ugd/2274a7_b57ed4fe6ae14534bb1db014e2fc422e.pdf
    • https://static.usrfiles.com/ugd/b8c837_65e00add5f7e4f819b732a07367ea238.pdf
    • https://cdn.shopify.com/s/files/1/0434/0776/9752/files/votufufapebububotutoveg.pdf
    • https://cdn.shopify.com/s/files/1/0434/0803/1893/files/69889383555.pdf
    • https://cdn.shopify.com/s/files/1/0432/3747/4466/files/spanish_family_tree_worksheet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b69.bin
f3b8843bd3691056ce9114bf78d92378328a24c49b8e07a65ed305f59eeb5bd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B69 4840 bytes
font_01_sfnt_off00005bdf.bin
3232e650c29c720c00492b4a540f32ebf33ceebeeb7df82262beba70bc871342		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BDF 10268 bytes
font_02_sfnt_off00007ec7.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EC7 4324 bytes

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