Malicious PDF — malware analysis report

Static analysis result for SHA-256 9320ff643eceb388…

MALICIOUS

PDF

86.4 KB Created: 2020-08-10 21:22:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9c6bf436dbdd61b57fd85134b92406a SHA-1: 48b957a63102fa4d2e200a918c7faaae4c500c7e SHA-256: 9320ff643eceb388f8f5d9a89000f252c09dd3b7d725621b43172cf012f44d42
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=caracteristicas+de+la+arquitectura+barroca+en+mexico+pdf'. Additionally, the PDF exhibits characteristics of a link farm, with numerous external links, many hosted on Shopify. The document body, though heavily obfuscated, contains the same redirect URL, suggesting the primary purpose is to trick the user into visiting this malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=caracteristicas+de+la+arquitectura+barroca+en+mexico+pdf
    • http://files.crusaders-for-christ.com/uploads/1/3/1/4/131453498/e5de8a8f7c45.pdf
    • http://files.sharitavonsikphotography.com/uploads/1/3/0/7/130739470/892586.pdf
    • http://files.christcommunityclarkston.com/uploads/1/3/1/8/131858540/deluvumunok_sajotiv_mebenuposigopi.pdf
    • http://bisuke.kirstenschwarz.com/uploads/1/3/1/3/131384429/3407553.pdf
    • https://cdn.shopify.com/s/files/1/0446/9604/3674/files/autocad_3d_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0447/2481/3977/files/8692014345.pdf
    • https://cdn.shopify.com/s/files/1/0435/1646/1211/files/42585613749.pdf
    • https://cdn.shopify.com/s/files/1/0429/0274/9347/files/git_auto_pull.pdf
    • https://cdn.shopify.com/s/files/1/0429/9295/9642/files/27005890750.pdf
    • https://cdn.shopify.com/s/files/1/0428/9078/9020/files/71363736181.pdf
    • https://cdn.shopify.com/s/files/1/0434/3041/2437/files/35548582859.pdf
    • https://cdn.shopify.com/s/files/1/0430/8510/3255/files/zagekutuvapo.pdf
    • https://cdn.shopify.com/s/files/1/0427/6033/9623/files/zegejaleruzezow.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/kurawejuzibasowuwimove.pdf
    • https://cdn.shopify.com/s/files/1/0430/8713/4882/files/kukewujonoronofog.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81579197248.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_off0001137b.bin
1a817ceb7eccc0189fb302b6c00452ce7be0b2ec3a29a354b427925ad1bdacad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1137B 5540 bytes
font_01_sfnt_off0001262c.bin
f0b1415c4415f407c120397e56bea6fc309c6ec2f926edeb881d4cfbfb317f8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1262C 11004 bytes

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