Malicious PDF — malware analysis report

Static analysis result for SHA-256 dae65b29cf0ce8b8…

MALICIOUS

PDF

40.4 KB Created: 2020-08-15 02:52:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 395554c0a8a9dfe8eaeddd0367cde9d2 SHA-1: c2af5ef9928cb13b8acdca86d2eef9ab69426ec9 SHA-256: dae65b29cf0ce8b80c719349538f7772ebaab8a24d9395ab0d2532cc579bb72d
152 Risk Score

Malware Insights

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

The PDF contains a high number of links to external resources, many of which are hosted on Shopify but point to potentially malicious content. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=mandatory+reporting+washington+wac'. The document body, though heavily obfuscated, contains this same URL, suggesting the primary purpose is to redirect the user to malicious content. No scripts were extracted, but the PDF structure and link farm indicate a social engineering attempt to lead users to harmful sites.

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=mandatory+reporting+washington+wac
    • http://files.kristinloeer.com/uploads/1/3/0/9/130969674/ripumizoj.pdf
    • http://fenefipu.bergkoenig-gstaad.com/uploads/1/3/0/7/130739457/a2a917cc64dca.pdf
    • https://cdn.shopify.com/s/files/1/0437/3266/4481/files/lp_blighted_ovum.pdf
    • https://cdn.shopify.com/s/files/1/0434/1547/0245/files/86218209657.pdf
    • https://cdn.shopify.com/s/files/1/0428/2833/3219/files/71350202234.pdf
    • https://cdn.shopify.com/s/files/1/0428/9213/2508/files/free_radical_polymerization_mechanism.pdf
    • https://cdn.shopify.com/s/files/1/0428/7964/7900/files/81697899104.pdf
    • https://cdn.shopify.com/s/files/1/0431/8940/3810/files/juzunona.pdf
    • https://cdn.shopify.com/s/files/1/0431/7321/6411/files/rirajiru.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_off00005a39.bin
50436d7ed61daa8dfc78b2cc4b607071ef88d507f01ee6bfbfd9cc182a5054f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A39 5504 bytes
font_01_sfnt_off00006d0a.bin
d525422506fb6f85c0c4e01004f1707c010957aa927aa9156aff11cca4dbab73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D0A 12624 bytes

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