Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea479cd886e24297…

MALICIOUS

PDF

39.0 KB Created: 2020-08-11 05:28:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2b17a7d4eec59992f73d3e7370afd0f4 SHA-1: c2110bfb4bbfc4ac4dc02c152e9639f5bd77418d SHA-256: ea479cd886e24297e6ec69ce05fa6d9c3b65c28e31d00c709891766d2388a6ea
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=cape+sociology+textbook+pdf'. This indicates a phishing or social engineering attempt to redirect the user to malicious infrastructure. The document body, though heavily obfuscated, also contains this URL, reinforcing the malicious intent. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm used for SEO poisoning or to obscure the final malicious destination.

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.ru/pify?keyword=cape+sociology+textbook+pdf
    • http://files.kmphotographyma.com/uploads/1/3/1/4/131407165/1126974.pdf
    • http://files.broadmoorwest.com/uploads/1/3/0/7/130776490/549dc5fa6.pdf
    • http://files.vermontphotos.net/uploads/1/3/0/7/130776567/bcd806744da72.pdf
    • http://megizono.primarydigit.com/uploads/1/3/1/6/131637136/6465517.pdf
    • https://cdn.shopify.com/s/files/1/0431/2524/4053/files/kvar_calculation_formula.pdf
    • https://cdn.shopify.com/s/files/1/0435/0532/0088/files/zaparugugoxe.pdf
    • https://cdn.shopify.com/s/files/1/0434/0360/8231/files/xozekatukutaripinebunewo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8385/8080/files/xafebipekabuz.pdf
    • https://cdn.shopify.com/s/files/1/0429/3872/8611/files/67364446359.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96951977507.pdf
    • https://cdn.shopify.com/s/files/1/0431/8347/2791/files/tosazugepagokavufuv.pdf
    • https://cdn.shopify.com/s/files/1/0430/9748/9572/files/lajiselejonagibewapubi.pdf
    • https://cdn.shopify.com/s/files/1/0440/6883/1382/files/mathematical_statistics_bickel_doksum.pdf
    • https://cdn.shopify.com/s/files/1/0430/4879/6309/files/34536162395.pdf
    • https://cdn.shopify.com/s/files/1/0432/3511/5175/files/nuxolipajinikewodimezada.pdf
    • https://cdn.shopify.com/s/files/1/0435/8628/9832/files/pharmaceutical_quality_assurance_interview_questions.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_off00005a22.bin
1a685a32f4e48e92888cd7ac39681068f26aa418ca2efc6437f1b4b21b3ffcc9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A22 5504 bytes
font_01_sfnt_off00006cfb.bin
5951303fe0ece4f354d29a1d1fc906b3b006ee6d7e506d7b2735d16720b0a8f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CFB 9920 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.