Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fe2b0301f010679…

MALICIOUS

PDF

70.8 KB Created: 2020-08-20 19:41:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f53988f87401a0504c6901c996d8fa6 SHA-1: ed2762179ca705ad28d97a5f3885e1977ce55f2a SHA-256: 1fe2b0301f010679872d266cd5fe3aaab9015c23ef57548b0784a1876037467e
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/pify?keyword=yahoo+answers+account+search'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on cdn.shopify.com. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the same redirector URL, suggesting its primary purpose is to lure users to malicious infrastructure.

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=yahoo+answers+account+search
    • http://wopube.dslvnjny.com/uploads/1/3/2/6/132696056/18b0ff5.pdf
    • http://soxizoxox.bmemf.org.uk/uploads/1/3/0/7/130776493/volovu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6997/2384/files/wosexizaba.pdf
    • https://cdn.shopify.com/s/files/1/0432/6994/7555/files/roliris.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/35035436777.pdf
    • https://cdn.shopify.com/s/files/1/0433/3905/5253/files/journal_of_landscape_architecture_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/9436/7644/files/3818461863.pdf
    • https://cdn.shopify.com/s/files/1/0436/3055/9390/files/14339733673.pdf
    • https://cdn.shopify.com/s/files/1/0434/6655/5556/files/5085242383.pdf
    • https://cdn.shopify.com/s/files/1/0429/0294/5959/files/24289373747.pdf
    • https://cdn.shopify.com/s/files/1/0432/9252/4702/files/wetadibejidimis.pdf
    • https://cdn.shopify.com/s/files/1/0433/9322/0766/files/bugoda.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/
    • https://cdn.shopify.com/s/fil

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aa4c.bin
5d1d679533aa0d751608ee8a39d5792907bc1052f357be1d685ff45722049892		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA4C 3796 bytes
font_01_sfnt_off0000b7c3.bin
f353759e7e73a0f4c5a90fe57351e8a6409ff1b30c5d823a7af782eef8938197		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB7C3 4908 bytes
font_02_sfnt_off0000c87f.bin
ca11542da12cbdbccf8b25c9df8e052e00ba22fc288aa895974a512764281353		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC87F 14312 bytes
font_03_sfnt_off0000f6ad.bin
6d6ab6282e13c5b86cafafa3344dcd313c131a703c8307c4e11af48c02e320e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AD 16700 bytes

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