Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a1c5d460f7afb73…

MALICIOUS

PDF

44.1 KB Created: 2020-08-14 04:39:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c06c9f51ba19b9ee4644f56a52adbff SHA-1: d8787184ea3d33389a28141abd733e5485bbdfc7 SHA-256: 6a1c5d460f7afb7393d83fa7bc4326428e4ee908423c71443399da6400404043
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely intended to lead the user to a malicious payload or phishing page. The document also exhibits characteristics of an SEO link farm, with numerous embedded links to other PDF files, suggesting an attempt to manipulate search engine results or distribute malware through a network of compromised sites. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence indicate a high likelihood of malicious intent.

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.ru/pify?keyword=budget+2020+malaysia+summary+pdf In PDF document text
    • http://files.mccathranpianostudio.com/uploads/1/3/0/7/130775557/veminegedu.pdfIn PDF document text
    • http://files.moduswaste.co.uk/uploads/1/3/0/8/130813557/4127349.pdfIn PDF document text
    • http://files.danssmallenginerepair.net/uploads/1/3/0/9/130969169/949e0dbb6264.pdfIn PDF document text
    • http://files.artwithperry.com/uploads/1/3/2/6/132695418/7578025.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/1/0431/2186/8960/files/23080288176.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2229/3920/files/neuralgia_treatment.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5911/8229/files/xlv_in_roman_numerals.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3945/7429/files/78724484095.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4437/9551/files/rusulo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8065/5775/files/68118060462.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5339/1765/files/78459560822.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7173/3917/files/vibajuxawebumaketofese.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2362/8450/files/zivofatikufise.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5261/4311/files/pimelaxenevomegelepovidek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8553/7175/files/87565240287.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9085/4566/files/kawasaki_weed_eater.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_off00006b49.bin
e6813622589126b57cb6884d55482382a0fd02fc5a80e5b756b2d6c6502ce8b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B49 5788 bytes
font_01_sfnt_off00007ef3.bin
6cbf98a70c14bdbada9318ebf3a67db3b958434e609848a0376608af6a0a2059		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EF3 10596 bytes

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