Malicious PDF — malware analysis report

Static analysis result for SHA-256 5be4db32ccf6cf1d…

MALICIOUS

PDF

55.2 KB Created: 2020-08-06 11:44:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 861deba820cab989e52f9adeadd8353b SHA-1: a826153f35f5eb6156cda840ad7a968b68c82e4f SHA-256: 5be4db32ccf6cf1dcb5813080e4b2c2c7e56a7f21619071c559cf8f1e10dd7bf
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external resources, suggesting a link farm or redirection attempt. One critical heuristic identified a link to known malicious redirector infrastructure at https://ttraff.com/pify. The document body, though heavily obfuscated, contains text related to the PDF's apparent topic and the malicious URL.

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=receptors+of+autonomic+nervous+system+pdf
    • http://files.smilecommunicationsgroup.com/uploads/1/3/2/6/132681002/vebevemiru.pdf
    • http://xuxej.coach-michael.com/uploads/1/3/1/3/131398091/senamixupi-padilomipok-niferu-ximedug.pdf
    • http://files.lm2go.com/uploads/1/3/1/3/131379213/gowuro-wilenulononej-rodugax.pdf
    • http://files.alecworley.com/uploads/1/3/0/7/130775373/joxukalefajere-dunetozigu-judewogapibewo-jizamikawaju.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/7749/1105/files/thyroid_surgical_anatomy.pdf
    • https://cdn.shopify.com/s/files/1/0432/1096/5147/files/vunugotuverovip.pdf
    • https://cdn.shopify.com/s/files/1/0431/3094/5693/files/rasavavifulup.pdf
    • https://cdn.shopify.com/s/files/1/0431/2684/9700/files/44559701625.pdf
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/livre_amlioration_continue.pdf
    • https://cdn.shopify.com/s/files/1/0429/3630/3782/files/64469737878.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12086745869.pdf
    • https://cdn.shopify.com/s/files/1/0440/2996/8534/files/55949001316.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6657/files/bacterias_gram_negativas_e_positivas.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89832202682.pdf
    • https://cdn.shopify.com/s/files/1/0431/4464/2715/files/lowes_oneonta_ny.pdf
    • https://cdn.shopify.com/s/files/1/0427/9622/0572/files/data_structures_and_algorithms_for_dummies.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://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008cfe.bin
5773a7be3c97b10ca56defda240094703af3d96d6b8921ba029522c495bd342c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CFE 5320 bytes
font_01_sfnt_off00009f09.bin
8ac36f9a623e001c5722d00b62bb9a1a1dac9eaf07a4a03d7ff12b133a466d35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F09 10204 bytes
font_02_sfnt_off0000c1d9.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC1D9 4324 bytes

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