Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b6c70f3b82adc94…

MALICIOUS

PDF

45.3 KB Created: 2020-08-26 09:45:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 935518c06be9a0fc8789dbd39d46bc29 SHA-1: 17ee180c92494196c48d7b77ae5df156638da8b9 SHA-256: 7b6c70f3b82adc946591b000a46b21bdb7e950747c03bdb7631ec2b6d5b8829b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. This suggests the document is designed to redirect users to potentially harmful websites, possibly for phishing or to host further malicious content.

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=canal+de+distribucion+detallista
    • http://files.ectorbio.com/uploads/1/3/1/3/131379382/nadufuruxozu.pdf
    • http://files.salonargio.com/uploads/1/3/1/4/131483148/kekemedotowix.pdf
    • http://files.proplayhockey.ca/uploads/1/3/1/3/131379042/wegebuxani.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/0345/9230/files/56640024145.pdf
    • https://cdn.shopify.com/s/files/1/0429/9925/1093/files/raxoxodikepebozok.pdf
    • https://cdn.shopify.com/s/files/1/0429/5891/3689/files/booster_seat_guidelines_nebraska.pdf
    • https://cdn.shopify.com/s/files/1/0435/1583/8618/files/27489470545.pdf
    • https://cdn.shopify.com/s/files/1/0430/9801/3850/files/adrenalina_hipolabor_bula.pdf
    • https://cdn.shopify.com/s/files/1/0430/5548/0981/files/21228800555.pdf
    • https://cdn.shopify.com/s/files/1/0432/5467/7662/files/butixejozoj.pdf
    • https://cdn.shopify.com/s/files/1/0432/5703/6968/files/pink_ward_shaco_guide_season_8.pdf
    • https://cdn.shopify.com/s/files/1/0449/6978/7560/files/movixo.pdf
    • https://cdn.shopify.com/s/files/1/0437/3797/2897/files/un_amante_de_ensueo_sherrilyn_kenyon.pdf
    • https://cdn.shopify.com/s/files/1/0430/2379/4339/files/geveterenezid.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/669297692.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000071aa.bin
03c247ed300391b52b401c736b681bcb85a9e40b741514528b18c11280f33070
pdf-font-stream PDF embedded font (sfnt) at offset 0x71AA 4980 bytes
font_01_sfnt_off00008295.bin
98cb41742e8301488bb1d3c2832801b718612d1a152a52e447f83db3303d55bc
pdf-font-stream PDF embedded font (sfnt) at offset 0x8295 11152 bytes