Malicious PDF — malware analysis report

Static analysis result for SHA-256 209e1c15d10ad2a3…

MALICIOUS

PDF

39.2 KB Created: 2020-09-01 13:20:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2266a9e6e364106f5b795a62a4cc53d8 SHA-1: da39e7b81407de08fc84cb94472c84ce289cdf0e SHA-256: 209e1c15d10ad2a3689f1f7b3ad650c96e354a6d40a76927bf5b27a521bc0df8
154 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to a known malicious redirector. The document body, though heavily obfuscated, contains text related to '2019 honda cr v review consumer reports' and the malicious URL. The presence of a link farm heuristic further suggests this PDF is part of a larger SEO poisoning or link distribution scheme.

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/wix?keyword=2019+honda+cr+v+review+consumer+reports
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/rupimuwipupavurof.pdf
    • https://cdn.shopify.com/s/files/1/0431/3376/3746/files/ford_e350_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0450/2857/3334/files/analysis_sentence_starters.pdf
    • https://static.usrfiles.com/ugd/49be48_91f5b2f3dbb1440199856a65bf2ada66.pdf
    • https://static.usrfiles.com/ugd/ed64d2_1afb0bb437b5418f9c797a07ab9e60e3.pdf
    • https://cdn.shopify.com/s/files/1/0434/4345/4119/files/45108192838.pdf
    • https://cdn.shopify.com/s/files/1/0430/5387/5357/files/44721188734.pdf
    • https://cdn.shopify.com/s/files/1/0428/0591/9903/files/53493330654.pdf
    • https://cdn.shopify.com/s/files/1/0434/2710/2887/files/all_car_brands_in_the_world.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000593f.bin
94b5de686fa7f8704b3cc19c72d8fe763dcfc4955ccdd0211e4c98985076012d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x593F 5820 bytes
font_01_sfnt_off00006cf5.bin
2ac5a1693dfc8d52555c61f9e6e569cb1f7fea700c522e1cd955118cdef50ef3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CF5 10420 bytes

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