Malicious PDF — malware analysis report

Static analysis result for SHA-256 c615fd66e3c915e0…

MALICIOUS

PDF

48.7 KB Created: 2020-08-22 03:58:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29bd5c92d7d5de3393e7b5d69107d779 SHA-1: d122250a98c5f2189a329951d35c7ce78f8dabc9 SHA-256: c615fd66e3c915e0fd10984ce26cf8e34d51940c84cc2c7894c9141d4668de62
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.com/pify?keyword=cursive+alphabet+handwriting+practice+worksheets'. Another critical heuristic identified a PDF link farm, suggesting a tactic to artificially inflate search engine rankings or distribute content. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the presence of numerous links, including a malicious redirector, indicates a likely phishing or malware distribution attempt.

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/pify?keyword=cursive+alphabet+handwriting+practice+worksheets
    • http://losexi.intricatetaste.com/uploads/1/3/0/8/130814729/270214f27.pdf
    • http://putatom.abanakeewellnesscenter.com/uploads/1/3/1/3/131383652/xazijejokomiwil-jozeguzumija-reloz-bitabobovixelen.pdf
    • http://papafeka.windyosborn.com/uploads/1/3/1/4/131408027/linunejulukoge-jojowovugamo-zowoki-mexevo.pdf
    • http://zakavu.kevincardiffcollection.com/uploads/1/3/1/4/131409090/1549452.pdf
    • http://jokubewi.harvestmooncanning.com/uploads/1/3/1/3/131398097/9a9377f45a2.pdf
    • https://cdn.shopify.com/s/files/1/0452/2462/4288/files/82524215702.pdf
    • https://cdn.shopify.com/s/files/1/0429/4384/0412/files/fonevema.pdf
    • https://cdn.shopify.com/s/files/1/0429/1218/6531/files/cumulative_distribution_function_relationship.pdf
    • https://cdn.shopify.com/s/files/1/0428/1358/7623/files/23950515069.pdf
    • https://cdn.shopify.com/s/files/1/0434/2608/7064/files/metal_gear_solid_1_ps_vita.pdf
    • https://cdn.shopify.com/s/files/1/0436/8610/1145/files/unitech_cable_tray_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0434/5973/9814/files/46713810274.pdf
    • https://cdn.shopify.com/s/files/1/0437/1149/6343/files/thyroid_storm_guideline_malaysia.pdf
    • https://cdn.shopify.com/s/files/1/0427/4218/6150/files/safopodimi.pdf
    • https://cdn.shopify.com/s/files/1/0433/5294/8901/files/90590427810.pdf
    • https://cdn.shopify.com/s/files/1/0438/6933/9808/files/aparato_digestivo_de_las_aves_y_sus_funciones.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_off000075f8.bin
aebc111913aa68105e8e94f9b1aa7887579c86f8530ab0d4d3276c89cb86974f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75F8 5596 bytes
font_01_sfnt_off00008909.bin
c8555a2bcd74ef600b818703355144e233ead01389461cc760441ad70bd2ac8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8909 13340 bytes

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