Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f42d4aa14a6c12e…

MALICIOUS

PDF

40.1 KB Created: 2020-09-04 17:15:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b6dacd06c89c42b7a7074ed945dc974 SHA-1: 1353f7bc18845717af3dadda21f5840d594ad807 SHA-256: 4f42d4aa14a6c12e2c560823a56e7ce31eb6144e6c94f1b04396fe17b293547e
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though partially corrupted, contains text related to "Caresource ga medicaid provider manual" and the malicious URL. The PDF also hosts a large number of external links, many pointing to Shopify, suggesting a link farm or redirection strategy. The ML classifier 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.club/wix?keyword=caresource+ga+medicaid+provider+manual
    • https://cdn.shopify.com/s/files/1/0436/1961/4882/files/buzidarodesi.pdf
    • https://cdn.shopify.com/s/files/1/0430/5692/2777/files/60376677109.pdf
    • https://cdn.shopify.com/s/files/1/0437/5573/3153/files/petetosimadoju.pdf
    • https://cdn.shopify.com/s/files/1/0435/5093/3156/files/amore_al_tempo_del_colera_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0433/7103/6835/files/tamaxugububexo.pdf
    • https://cdn.shopify.com/s/files/1/0437/9623/4400/files/14399001360.pdf
    • https://cdn.shopify.com/s/files/1/0433/3761/3461/files/1395808697.pdf
    • https://cdn.shopify.com/s/files/1/0431/7508/4193/files/zatil.pdf
    • https://cdn.shopify.com/s/files/1/0429/6887/5157/files/rifimo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0426/3585/files/html_rainbow_background.pdf
    • https://cdn.shopify.com/s/files/1/0433/4013/6601/files/fitness_for_life_chapter_2_review_answers.pdf
    • https://cdn.shopify.com/s/files/1/0461/8944/5283/files/87681214013.pdf
    • https://static.usrfiles.com/ugd/9ff9b8_3ff4fa90ba7143a8bd71585f02ba1c1f.pdf
    • https://static.usrfiles.com/ugd/8cbfce_b72c4cc015ff40b7a2cace57b30ec236.pdf
    • https://static.usrfiles.com/ugd/b8c837_f94ba408e5774401aeaaa9c15923d862.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005131.bin
0323ec546295bf9a5fd3b6556cfd6eed460ae1bb178bbe3ac2c948d18e7825df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5131 5280 bytes
font_01_sfnt_off0000630c.bin
bfa3224896d930c350374db5624e572667d36008e55b7205633a75ea36d5a7e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x630C 10068 bytes
font_02_sfnt_off0000857e.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x857E 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.