Malicious PDF — malware analysis report

Static analysis result for SHA-256 26e6d1549b1d8450…

MALICIOUS

PDF

46.2 KB Created: 2020-08-10 07:57:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d19819e2dc0a566d3704e6c8cd635cc9 SHA-1: 219fd16ea73ff2a4c40c08176b788aecc609acda SHA-256: 26e6d1549b1d84505806180d64191d739d0bbd244d1aa9f94aea2bdc00d7de4f
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many pointing to domains associated with link farms and redirectors, indicating a malicious intent to direct users to harmful content. The ML classifier strongly flagged this PDF, and the presence of a redirector link further supports its malicious nature. The document body itself appears to be obfuscated or corrupted, but the embedded URLs are the primary indicators of compromise.

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=el+cine+documental+en+primera+persona+pdf
    • http://navira.pamperandpreen.co.uk/uploads/1/3/1/8/131856772/fiwexuvesadosogabe.pdf
    • http://meput.casjanssen.org/uploads/1/3/1/0/131069839/febefejazo.pdf
    • http://files.kaptive8photo.com/uploads/1/3/2/6/132681322/aaf35d1f4b70.pdf
    • http://files.priorityathlete.com/uploads/1/3/0/7/130738799/8000719.pdf
    • https://cdn.shopify.com/s/files/1/0433/7542/7735/files/wupipuvaju.pdf
    • https://cdn.shopify.com/s/files/1/0427/6604/1244/files/mumon.pdf
    • https://cdn.shopify.com/s/files/1/0435/9526/8264/files/kipop.pdf
    • https://cdn.shopify.com/s/files/1/0431/6905/4886/files/81188108113.pdf
    • https://cdn.shopify.com/s/files/1/0431/0938/4343/files/gatuberumesidafetezoxu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3461/5708/files/55058812165.pdf
    • https://cdn.shopify.com/s/files/1/0435/4015/2475/files/60884057299.pdf
    • https://cdn.shopify.com/s/files/1/0433/1474/1413/files/39953089008.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/55646344847.pdf
    • https://cdn.shopify.com/s/files/1/0427/9762/9596/files/59273585525.pdf
    • https://cdn.shopify.com/s/files/1/0434/6911/1449/files/big_ideas_math_algebra_1.pdf
    • https://cdn.shopify.com/s/files/1/0434/6193/5261/files/jayz_reasonable_doubt_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/6372/9557/files/numusazisisokakupuv.pdf
    • https://cdn.shopify.com/s/files/1/0430/5181/0969/files/anabolisme_asam_amino.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_off0000751b.bin
649ead40d2183fb485e099b2e7d3415b960fddcd0b716226074c31e6b5774aee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x751B 5256 bytes
font_01_sfnt_off000086e1.bin
7836a970057ed50bc706821574024f85019d2d6c53665056be7208faa36469b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86E1 10752 bytes

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