Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e71748da647010e…

MALICIOUS

PDF

49.6 KB Created: 2020-08-19 00:53:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a52646e97639339a95ab7c669b904a0b SHA-1: 95cd419dcce40d594e5c7d6398c5f0a2c1a20c71 SHA-256: 0e71748da647010eec2c520df627b7ff6a2a68ae4c08b0a7afbb733cc3b780de
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, appears to reference a rice cooker manual, suggesting a lure. The presence of numerous external PDF links, many hosted on Shopify, indicates a potential link farm or SEO manipulation tactic to distribute 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.cc/pify?keyword=aroma+rice+cooker+manual+arc-+363-+1ngb
    • http://files.amglasswork.com/uploads/1/3/0/7/130739697/wunobotuzewo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/7723/7913/files/82813344357.pdf
    • https://cdn.shopify.com/s/files/1/0443/0639/9388/files/concepto_de_pedagogia_segun_autores.pdf
    • https://cdn.shopify.com/s/files/1/0435/1610/0776/files/ziriligoporokumudexutit.pdf
    • https://cdn.shopify.com/s/files/1/0430/8015/5289/files/pemasejulejam.pdf
    • https://cdn.shopify.com/s/files/1/0436/4982/6969/files/xifajozizobevemoxorin.pdf
    • https://cdn.shopify.com/s/files/1/0431/4942/6845/files/48921887963.pdf
    • https://cdn.shopify.com/s/files/1/0429/6402/5493/files/66761673151.pdf
    • https://cdn.shopify.com/s/files/1/0445/6490/6148/files/maths_formulas_for_class_6_to_8.pdf
    • https://cdn.shopify.com/s/files/1/0434/5459/5224/files/71573251181.pdf
    • https://cdn.shopify.com/s/files/1/0433/1739/5614/files/lomipiwururegikejam.pdf
    • https://cdn.shopify.com/s/files/1/0448/3586/4736/files/arrival_guides_api.pdf
    • https://cdn.shopify.com/s/files/1/0430/8333/3786/files/45549016602.pdf
    • https://cdn.shopify.com/s/files/1/0434/0993/2440/files/dnd_5e_monsters_by_cr.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_off00007242.bin
ee296f1ce23c3fff34d8e09c932dc4e6b0ce129af6ee0aa043adc35fad0b4a75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7242 5340 bytes
font_01_sfnt_off0000844b.bin
224c913c34dbd32cea7d0c4a0bf859125835ae4113b061e9d0700412ae280abe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x844B 10772 bytes
font_02_sfnt_off0000a920.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA920 4324 bytes

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