Malicious PDF — malware analysis report

Static analysis result for SHA-256 5139c126dd0f8019…

MALICIOUS

PDF

45.0 KB Created: 2020-08-04 03:31:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e99d95a0085dfb624f5ab93675cfd405 SHA-1: c4a6b347da12395403f18ca871fb5087959ecc77 SHA-256: 5139c126dd0f80197df2dd5121c7d9b0890cbeb832e622c517af5aaaac0dc9bc
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure, specifically 'https://ttraff.cc/pify?keyword=buffer+overflow+attacks+detect+exploit+prevent+pdf+download'. This URL is designed to lure users into downloading further malicious content. The document also contains a large number of external PDF links, many hosted on Shopify, suggesting a link farm for SEO poisoning or distribution. No scripts were extracted from this sample.

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=buffer+overflow+attacks+detect+exploit+prevent+pdf+download
    • http://files.donpollo.net/uploads/1/3/0/7/130738988/6151c2a8a.pdf
    • http://files.myenchantedlocket.com/uploads/1/3/1/4/131437119/16c22d153a62b5.pdf
    • http://files.theteachingsofmichael.com/uploads/1/3/2/6/132682701/jolew.pdf
    • http://files.impactk9usa.com/uploads/1/3/2/8/132815979/nubatuxa-zotozibupi-faperaxuj-xexaba.pdf
    • https://cdn.shopify.com/s/files/1/0432/3321/4621/files/xisejapamofikefokomabupe.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/97458960027.pdf
    • https://cdn.shopify.com/s/files/1/0429/1667/5740/files/wufufuzizov.pdf
    • https://cdn.shopify.com/s/files/1/0428/5405/6092/files/wifetesesebodiwiwabo.pdf
    • https://cdn.shopify.com/s/files/1/0436/1915/6130/files/zuzusaxi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6915/3181/files/gunusunemoz.pdf
    • https://cdn.shopify.com/s/files/1/0435/2871/6439/files/nuletamalamejomogosefub.pdf
    • https://cdn.shopify.com/s/files/1/0437/9662/7616/files/jevodenezibowefuzafok.pdf
    • https://cdn.shopify.com/s/files/1/0434/3015/0300/files/magega.pdf
    • https://cdn.shopify.com/s/files/1/0428/9275/5111/files/9103767261.pdf
    • https://cdn.shopify.com/s/files/1/0428/7463/4403/files/vadanizibegedes.pdf
    • https://cdn.shopify.com/s/files/1/0430/2117/2897/files/yamaha_raptor_660_parts.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_off00006d92.bin
0c04882722362fc72cf0f7f86bce1fedb1ff28db3c958a2b404302785760a47a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D92 5484 bytes
font_01_sfnt_off00008067.bin
d73ed13b37e323fb4508eb7b439052a6b16f36ec39d19905d1375baf157a5eaa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8067 11476 bytes

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