Malicious PDF — malware analysis report

Static analysis result for SHA-256 aed1dbaa4a32dff7…

MALICIOUS

PDF

52.5 KB Created: 2020-08-22 01:52:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19e95bd7c299ea5adb23937d52114abd SHA-1: 4dbb8105b755385d0f9619d7314c9da5e951eebc SHA-256: aed1dbaa4a32dff7de46c8a9448c71816630c86545ebbd4eaa881b7f2fa27e4e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document was flagged as malicious by a machine learning classifier and contains a critical heuristic firing for a malicious redirector link. The document body, though heavily obfuscated, contains the primary malicious URL. The presence of a link farm with numerous external PDF links, many hosted on Shopify, suggests an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes. The primary malicious URL is https://ttraff.cc/pify?keyword=apertura+piriformis+%25D0%25BF%25D0%25B5%25D1%2580%25D0%25B5%25D0%25B2%25D0%25BE%25D0%25B4.

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=apertura+piriformis+%25D0%25BF%25D0%25B5%25D1%2580%25D0%25B5%25D0%25B2%25D0%25BE%25D0%25B4
    • http://files.relationalrewilding.com/uploads/1/3/1/8/131858916/1bafb390eb4.pdf
    • http://files.memorybengesa.org/uploads/1/3/1/1/131163833/muboraxadage.pdf
    • http://files.decksbydecamp.com/uploads/1/3/1/3/131398036/wunotonid_redewaf.pdf
    • http://files.oshkoshcarpetcleaning.com/uploads/1/3/2/6/132681947/8609150.pdf
    • http://files.transcendingconsciousness.com/uploads/1/3/2/6/132695329/daxezalukasizapo.pdf
    • https://cdn.shopify.com/s/files/1/0440/8272/5029/files/59666669299.pdf
    • https://cdn.shopify.com/s/files/1/0431/1485/6610/files/66715757421.pdf
    • https://cdn.shopify.com/s/files/1/0431/7121/7565/files/45885417321.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rumifagekesodurelakalon.pdf
    • https://cdn.shopify.com/s/files/1/0429/7188/9815/files/surolatepuso.pdf
    • https://cdn.shopify.com/s/files/1/0431/3461/5708/files/zorujikatenaguxufe.pdf
    • https://cdn.shopify.com/s/files/1/0429/7624/7967/files/nudogelemajo.pdf
    • https://cdn.shopify.com/s/files/1/0437/8460/1758/files/26951288716.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d0d.bin
109128d24106941b3f845d5dc668852f2a62c955da5ce8bc44629b9b300edec1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D0D 5636 bytes
font_01_sfnt_off00007f2b.bin
bdf7391b38d42e153c28988e478df3d051141e39bf2b2228b25af8ba00f3c0e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F2B 14864 bytes
font_02_sfnt_off0000ace5.bin
ad9128bb84cb390c5b5c0369dbf8d0253ad9bb7bd700eb57232eb4bde6dc5e53		 pdf-font-stream PDF embedded font (sfnt) at offset 0xACE5 16336 bytes

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