Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cff36c4138f73ca…

MALICIOUS

PDF

110.4 KB Created: 2020-08-09 00:27:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d153fb41814b1ea7d8b0f5b9a5c6464f SHA-1: c0bdd6f5f50c3174f9ca6f7aa9842925e9e28db8 SHA-256: 2cff36c4138f73ca00ec67df5a4e3c1fdc007aecd436b4a2917c1f79a1143c54
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.cc/pify?keyword=asian+history+pdf'. This suggests the document is designed to redirect users to malicious infrastructure, likely for further exploitation or credential harvesting. The ML classifier strongly supports the malicious nature of this PDF.

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=asian+history+pdf
    • http://files.animalmystic.org/uploads/1/3/0/7/130775743/kewezujiko-dumoregoso.pdf
    • http://files.texasamericanart.com/uploads/1/3/0/9/130970014/b71660437.pdf
    • http://files.brianboydmotorsports.com/uploads/1/3/0/8/130874642/8712781.pdf
    • http://files.thepurplepetalstore.com/uploads/1/3/1/4/131455463/3568661.pdf
    • http://files.brandonmoorecomposition.com/uploads/1/3/1/4/131438766/muxigem.pdf
    • https://cdn.shopify.com/s/files/1/0428/5241/7703/files/61076060894.pdf
    • https://cdn.shopify.com/s/files/1/0432/0228/1633/files/frases_en_ingles_para_dummies_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0434/7795/8816/files/functions_of_vocational_guidance.pdf
    • https://cdn.shopify.com/s/files/1/0437/4839/3112/files/explain_the_8_millennium_development_goals.pdf
    • https://cdn.shopify.com/s/files/1/0440/6099/9830/files/43846105183.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pifafesilepobusofamut.pdf
    • https://cdn.shopify.com/s/files/1/0440/2970/6390/files/54975731512.pdf
    • https://cdn.shopify.com/s/files/1/0431/4795/2294/files/pimetolite.pdf
    • https://cdn.shopify.com/s/files/1/0429/7375/7603/files/38912300883.pdf
    • https://cdn.shopify.com/s/files/1/0439/0017/4504/files/gusabedojizesilig.pdf
    • https://cdn.shopify.com/s/files/1/0436/1909/0595/files/pass_compos_avoir_etre.pdf
    • https://cdn.shopify.com/s/files/1/0432/8692/1374/files/lazonikawute.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015518.bin
33bff7b2b2fd0955258ad552080fdfa0de155701b3f9ec838c1a000ab7f27131		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15518 5016 bytes
font_01_sfnt_off0001666a.bin
dc421a2fd8e5c2f17307b3a6cb801e84370bd97a50c26117d1055881675c7855		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1666A 5188 bytes
font_02_sfnt_off00017815.bin
b366811bfb0e95e333c3dbf86ef82e6dc827337a693ede27790bbe48e163faa5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17815 11724 bytes
font_03_sfnt_off00019de0.bin
470f5d67714cde75e6e268dcd64d5a083a78118cf1b5f422527fa529c196211b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19DE0 3584 bytes

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