Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e429805ae66425d…

MALICIOUS

PDF

33.9 KB Created: 2020-08-03 22:13:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 125130357083d125dc0652e42c4ab970 SHA-1: 805f7307ce9c251933100d1a76403aa89fc79973 SHA-256: 6e429805ae66425de8906faa3fef50c4a2725880d7be772e724f67f54ddaf8ce
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains numerous links, including one pointing to a known malicious redirector at 'https://ttraff.cc/pify?keyword=btec+level+2+first+hospitality+student+book+pdf'. The presence of a link farm and the ML classifier's high confidence score indicate a malicious intent to redirect users to harmful sites. The document body, though partially corrupted, contains text related to educational materials, suggesting a lure to disguise the malicious links.

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=btec+level+2+first+hospitality+student+book+pdf
    • http://files.asthecrowfliesandco.com/uploads/1/3/2/7/132740285/ab819754e64.pdf
    • http://files.joelouismusic.com/uploads/1/3/1/3/131383943/de22852315f2268.pdf
    • http://files.scfriends.org/uploads/1/3/1/1/131164421/fefavuworelikefi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/puneberun.pdf
    • https://cdn.shopify.com/s/files/1/0431/6656/4507/files/kajorebokojogimipevafaw.pdf
    • https://cdn.shopify.com/s/files/1/0435/5925/6232/files/mosby_s_guide_to_physical_examination.pdf
    • https://cdn.shopify.com/s/files/1/0431/3861/3399/files/17283153904.pdf
    • https://cdn.shopify.com/s/files/1/0430/9925/9031/files/55339807102.pdf
    • https://cdn.shopify.com/s/files/1/0438/9378/4728/files/75030404564.pdf
    • https://cdn.shopify.com/s/files/1/0431/1403/7397/files/15682030772.pdf
    • https://cdn.shopify.com/s/files/1/0434/2821/6997/files/bejalolodegujesitov.pdf
    • https://cdn.shopify.com/s/files/1/0434/7317/4680/files/leatherworking_guide_vanilla.pdf
    • https://cdn.shopify.com/s/files/1/0432/0290/4222/files/pididak.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/pukepipi.pdf
    • https://cdn.shopify.com/s/files/1/0434/2313/7943/files/79983064062.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004753.bin
7c14619ac1f1b6038d2ff13ff8758149975ad9a5c37f11619d905a3c965e5ac6
pdf-font-stream PDF embedded font (sfnt) at offset 0x4753 5792 bytes
font_01_sfnt_off00005b11.bin
2ab285a289631c92548884a24c4d00f5655a1bafe47b17c877ae5d797f87f411
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B11 9332 bytes