Malicious PDF — malware analysis report

Static analysis result for SHA-256 55370875ff709361…

MALICIOUS

PDF

45.1 KB Created: 2020-07-28 18:22:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26e231ce514eb52cefa79d38ba73ca62 SHA-1: e65d15c527c06d84f9a43a35e650514689ef37b3 SHA-256: 55370875ff709361c606ffb98abda3a6dde1d4dd9b9e7f7c210e5ce2e7e1ee48
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a significant number of embedded links, identified as a 'PDF_SEO_LINK_FARM' heuristic, pointing to various shopify domains and a redirector. The primary redirector URL, 'https://ttraff.cc/pify?keyword=ashe+guide+tft', is flagged as malicious. The ML classifier also strongly indicates maliciousness. The document body contains garbled text, but the presence of the 'ashe guide tft' keyword in the redirector URL suggests a potential lure.

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=ashe+guide+tft
    • http://files.montessoridonelson.org/uploads/1/3/2/8/132814589/xitinuzowekadupu.pdf
    • http://files.delaneype.com/uploads/1/3/1/0/131070938/vomisatinenasuj.pdf
    • http://files.skinandbodyworks.net/uploads/1/3/0/9/130969403/332da.pdf
    • http://files.middleparkwcd.com/uploads/1/3/0/8/130813732/12dd68069c0.pdf
    • http://files.middleparkwc
    • https://cdn.shopify.com/s/files/1/0435/2334/2495/files/4684679684.pdf
    • https://cdn.shopify.com/s/files/1/0429/2621/1238/files/62501710928.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/radeziwiwilajumigetadad.pdf
    • https://cdn.shopify.com/s/files/1/0434/2428/4824/files/xaluniperugo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6897/2444/files/dogosivimunexoredode.pdf
    • https://cdn.shopify.com/s/files/1/0433/0212/5733/files/desolotufatezafofobo.pdf
    • https://cdn.shopify.com/s/files/1/0433/2571/8678/files/xajodoxurapojodemagofa.pdf
    • https://cdn.shopify.com/s/files/1/0427/4287/4278/files/gededuruniseserivuxutato.pdf
    • https://cdn.shopify.com/s/files/1/0430/7140/6237/files/kijozes.pdf
    • https://cdn.shopify.com/s/files/1/0430/9958/6714/files/66036259391.pdf
    • https://cdn.shopify.com/s/files/1/0431/7967/1718/files/wodepe.pdf
    • https://cdn.shopify.com/s/files/1/0432/5651/2676/files/pujazirotirolusonexokox.pdf
    • https://cdn.shopify.com/s/files/1/0429/5131/1513/files/70419922742.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_off00007442.bin
addd12b9d0e9a303a6e86ce344d7bebe4f3813315948b0eecfff0364fb90cb82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7442 4488 bytes
font_01_sfnt_off00008393.bin
b9ce54cd558de5ed25817726bd9993060e331925b90f61c7a25de1264762c020		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8393 10560 bytes

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