Malicious PDF — malware analysis report

Static analysis result for SHA-256 13c40b8431b95536…

MALICIOUS

PDF

200.1 KB Created: 2020-11-02 00:03:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b44b06494b19b41f959129ec1c73ef09 SHA-1: d7ae389b8ea046a08a5f90d86eabad792119bd56 SHA-256: 13c40b8431b955369d7b757f709a67fb378c2c66166d0ca226a915faff10aedf
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing indicating a link to known malicious redirector infrastructure. The embedded URL, 'https://ttraff.ru/123?keyword=pagare+formato+pdf', is the primary indicator of malicious intent. While no scripts were explicitly extracted, the PDF structure and the presence of a malicious URL strongly suggest an attempt to lure the user to a harmful site, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 3

  • 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.
  • 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.ru/123?keyword=pagare+formato+pdf
    • https://jiwepurojal.weebly.com/uploads/1/3/0/7/130775762/zirilapalir-bisojexowesomes.pdf
    • https://cdn-cms.f-static.net/uploads/4368748/normal_5f87ef38dd9fb.pdf
    • https://cdn-cms.f-static.net/uploads/4366311/normal_5f97cd709b7ca.pdf
    • https://lanigitekepag.weebly.com/uploads/1/3/4/3/134395773/7816600.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/bezegoluzose/cease_funeral_home_mn.pdf
    • https://s3.amazonaws.com/wisuw/genisopisononez.pdf
    • https://cdn.shopify.com/s/files/1/0484/2163/4206/files/30465637867.pdf
    • https://s3.amazonaws.com/juxatop/3919654819.pdf
    • https://s3.amazonaws.com/roware/kulemafamibikizawej.pdf
    • https://cdn.shopify.com/s/files/1/0495/9915/2292/files/nowegemixiv.pdf
    • https://cdn.shopify.com/s/files/1/0428/7227/5103/files/rite_aid_pregnancy_test_false_negative.pdf
    • https://s3.amazonaws.com/kevava/biografie_mihai_eminescu.pdf
    • https://cdn.shopify.com/s/files/1/0493/6115/8303/files/anarchy_online_agent_leveling_guide.pdf
    • https://cdn.shopify.com/s/files/1/0501/3680/9665/files/archeage_unchained_blighter_guide.pdf
    • https://cdn.shopify.com/s/files/1/0499/2463/6823/files/surgeon_simulator_android_revdl.pdf
    • https://s3.amazonaws.com/fuwawibu/mueller_report_searchable_text.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_009_off0002dc30.bin
fd26e9e00fd98d727b0edd13114a6aff2a635617739791723ec093d1af23ce61		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2DC30 29672 bytes
font_00_sfnt_off000292f9.bin
4564c9f0a1302c2ec2b7fdd8ff01bf36548ddd3a3d5008f5928cdd2402716b9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x292F9 4796 bytes
font_01_sfnt_off0002a3cf.bin
e4c5030cd7d8bea231c2575fbb4a7b665cb8395977d80a9285e28e822390144c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A3CF 5152 bytes
font_02_sfnt_off0002b546.bin
83d79d987e32c90d7b06bb294297ffe1ee17cb9f48f706281de44a8fb9c34521		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B546 11880 bytes

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