Malicious PDF — malware analysis report

Static analysis result for SHA-256 97ec9012bdc00e54…

MALICIOUS

PDF

71.8 KB Created: 2020-08-12 10:05:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f95e39c8a1ae1d3d9bb3cfa05821a610 SHA-1: a1281a086a28e49e9cfe4b8694b157457a30388f SHA-256: 97ec9012bdc00e54ec0bba63f50caf04ada9304608a7cebdf6849aa2450b05e2
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, forming a link farm. One of these links, 'https://ttraff.cc/pify?keyword=antidiabetic+activity+of+plants+pdf', is identified as a malicious redirector. This suggests the document is designed to lure users to malicious infrastructure through a deceptive link farm. 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/pify?keyword=antidiabetic+activity+of+plants+pdf
    • http://files.rexforddrive.com/uploads/1/3/0/8/130813732/d93f701ec22.pdf
    • http://sunofij.practicegracenow.com/uploads/1/3/1/4/131453723/janimet.pdf
    • http://vupij.brettwalker.solutions/uploads/1/3/2/8/132814930/vimada-gikifoku-bosaxon-zifer.pdf
    • http://weruf.wagner-heavymetal.com/uploads/1/3/1/4/131453541/2013967.pdf
    • http://lotekumix.gracehomeklang.org/uploads/1/3/0/7/130738629/1390731.pdf
    • https://cdn.shopify.com/s/files/1/0435/9503/8877/files/alopecia_androgenica_femenina_tratamiento.pdf
    • https://cdn.shopify.com/s/files/1/0433/9728/3992/files/lonexatumerojoj.pdf
    • https://cdn.shopify.com/s/files/1/0434/9739/0244/files/niligak.pdf
    • https://cdn.shopify.com/s/files/1/0431/7826/2692/files/15914458945.pdf
    • https://cdn.shopify.com/s/files/1/0433/4954/1017/files/makro_specials_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0434/6275/4461/files/fisiopatologia_de_insuficiencia_cardiaca_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/3667/2162/files/zizogapanixobi.pdf
    • https://cdn.shopify.com/s/files/1/0428/3557/4943/files/vunafejin.pdf
    • https://cdn.shopify.com/s/files/1/0430/5109/0077/files/32684067315.pdf
    • https://cdn.shopify.com/s/files/1/0432/5074/5512/files/jilosunonevud.pdf
    • https://cdn.shopify.com/s/files/1/0434/0780/2531/files/43633942278.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_off0000ce19.bin
cc029868b240578002968b6f46a79017f557038cb2a3bc157cb271e71aab9e6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE19 5132 bytes
font_01_sfnt_off0000dfa6.bin
0203fdb8e24329de86e2efffc121caa8f070b57c92d0eb4e555e32531659518f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA6 10756 bytes
font_02_sfnt_off000103db.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103DB 4324 bytes

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