Malicious PDF — malware analysis report

Static analysis result for SHA-256 46a6554f48a99635…

MALICIOUS

PDF

45.8 KB Created: 2020-08-29 13:52:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6c5e764a89315bfd45a225dcd6d3a73 SHA-1: 79d4d5090d609f7fe7e14f0acfa93f9be8e32e24 SHA-256: 46a6554f48a99635e3bba9ff71b826839803f1b1d32b22d1de8ec5598aaddccd
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=annie+leibovitz+at+work+pdf+download'. This URL is embedded within the document body, suggesting a social engineering lure to trick the user into clicking it. The presence of numerous other PDF links, many pointing to benign Shopify domains, indicates a potential SEO poisoning or link farm tactic to obscure the malicious destination. No scripts were extracted from this sample.

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=annie+leibovitz+at+work+pdf+download
    • https://static.usrfiles.com/ugd/b8c837_6821137c406144e4a16a979c4c63d974.pdf
    • https://static.usrfiles.com/ugd/b8c837_e7a8f57579a54e8bb5522ce5f8d24548.pdf
    • https://static.usrfiles.com/ugd/b8c837_b72dee6326534a7fa73e2601425d7c25.pdf
    • https://cdn.shopify.com/s/files/1/0430/2385/9873/files/fefolotipakuzonadazobab.pdf
    • https://cdn.shopify.com/s/files/1/0432/0857/3085/files/83483758249.pdf
    • https://cdn.shopify.com/s/files/1/0431/6499/1637/files/prentice_hall_federal_taxation_2015.pdf
    • https://cdn.shopify.com/s/files/1/0429/2280/3366/files/30610398248.pdf
    • https://cdn.shopify.com/s/files/1/0429/5196/6873/files/tratamiento_del_accidente_cerebrovascular_isquemico.pdf
    • https://cdn.shopify.com/s/files/1/0429/9502/4033/files/27760576693.pdf
    • https://cdn.shopify.com/s/files/1/0437/8345/4871/files/tapisimekixigaveneki.pdf
    • https://cdn.shopify.com/s/files/1/0434/3667/1132/files/takapexedazewoxifadawugim.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/96617946950.pdf
    • https://cdn.shopify.com/s/files/1/0431/4375/7992/files/continuous_probability_distribution_examples_and_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0437/5724/0478/files/zadiketiped.pdf
    • https://cdn.shopify.com/s/files/1/0431/2317/9677/files/pathfinder_kingmaker_kingdom_management.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_off00007667.bin
5d0a2324e3d7c4ef5cc88659f315361b542bc5f29e5b94f642ec1b0430d32523		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7667 5252 bytes
font_01_sfnt_off0000886a.bin
4c34fa2b894a447a1e6a77b9f9f6ad644b9f6bbd912b04a77d11d0d88597c610		 pdf-font-stream PDF embedded font (sfnt) at offset 0x886A 9932 bytes

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