Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cf74161f22daf07…

MALICIOUS

PDF

34.9 KB Created: 2020-08-25 13:14:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 555c4f1bde0b1f3c29a3f8dbe7aa16b2 SHA-1: b679aa3a31d831efb433f714becd7471bd24c6a4 SHA-256: 4cf74161f22daf07fa51e61a496d9a154046e11c07a68b5e3432c2478f1dcb8b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, many of which point to benign Shopify URLs, but one link directs to known malicious redirector infrastructure. This suggests an attempt to lure users to malicious content, potentially for phishing or malware distribution. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

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=metal+gear+rising+revengeance+android+wallpaper In PDF document text
    • http://files.joewoodmanwildlife.com/uploads/1/3/2/6/132695701/5bdf07640bf952.pdfIn PDF document text
    • http://noporelag.myunfilteredeveryday.com/uploads/1/3/1/8/131857315/zazepikizasepoj.pdfIn PDF document text
    • http://files.iam4republicairways.com/uploads/1/3/0/7/130739949/waxagawafe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/3917/9161/files/free_phonics_worksheets_for_older_students.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/6588/9188/files/astrology_calendar_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/suzuki_bandit_250_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/77715827073.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4097/1674/files/vepexijawuvepebajunazob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0923/6374/files/81961516054.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/3540/7014/files/nikon_d5200_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4059/5352/files/finutup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/nuwajosowaleku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9440/0414/files/programming_the_world_wide_web.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3570/2949/files/folinenaloloxanupekin.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000049f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49F2 5400 bytes
SHA-256: 6e36b4f0ceb48bd8d12fc2fcbb8f7a7d86fb8e3ae8f953eba0c95f5cc4c57bde
font_01_sfnt_off00005c79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C79 9972 bytes
SHA-256: f4d1c3f079da6ed27b1b9f0f76b15a0cee765c57f4aa6a51d009fb6ccea195a6

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