Malicious PDF — malware analysis report

Static analysis result for SHA-256 0847ab6333f96e96…

MALICIOUS

PDF

144.9 KB Created: 2020-08-20 12:44:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f1f0576973e92c068b08c81a01368f2 SHA-1: 71a0bd265ce0858aecf5f69dcccde748babd462e SHA-256: 0847ab6333f96e9694ce60f929ce1a3e51222d79870af13dcf38215ff319d7b3
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.cc, which is designed to obscure the final destination. The document body, though heavily obfuscated, contains the same URL and keywords suggesting a lure. The presence of numerous links to external PDFs, many hosted on Shopify, indicates a link farm used for SEO poisoning or distributing malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=online+timer+bomb+free
    • http://files.ab4xy.com/uploads/1/3/0/7/130740062/devik.pdf
    • http://basuka.rolloconstruction.com/uploads/1/3/2/8/132814930/6d55b.pdf
    • http://files.pricelessstoriesphotography.com/uploads/1/3/1/8/131872032/9686794.pdf
    • http://bulupa.juliekelleytv.com/uploads/1/3/0/9/130969600/nanarejoxoduvizis.pdf
    • http://files.tghair.co/uploads/1/3/0/9/130969440/desekesulebone.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0438/0455/7472/files/rutanamoferijimisasumi.pdf
    • https://cdn.shopify.com/s/files/1/0430/0124/9955/files/lisogiwidagakixirax.pdf
    • https://cdn.shopify.com/s/files/1/0437/9761/0657/files/fozagesixiberitupimizidan.pdf
    • https://cdn.shopify.com/s/files/1/0430/2874/2298/files/mawezimazus.pdf
    • https://cdn.shopify.com/s/files/1/0430/8438/2357/files/69171668442.pdf
    • https://cdn.shopify.com/s/files/1/0434/0531/2163/files/contending_economic_theories.pdf
    • https://cdn.shopify.com/s/files/1/0437/3420/4568/files/70634230841.pdf
    • https://cdn.shopify.com/s/files/1/0432/5045/0600/files/guia_para_aprender_espanhol.pdf
    • https://cdn.shopify.com/s/files/1/0434/0364/0990/files/vinoboselesijo.pdf
    • https://cdn.shopify.com/s/files/1/0428/4494/6588/files/71730967779.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001e572.bin
81cea5edb682132a58b09a84f8cc765583e953eb0b0f50885371865f19ab1b32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E572 4480 bytes
font_01_sfnt_off0001f48f.bin
723de957a6886a33f456c3c42b80b87e06d94fcc445b0fe18871a34c80d8090b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1F48F 16644 bytes
font_02_sfnt_off000227c1.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x227C1 4324 bytes

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