Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2798803efd9a3e6…

MALICIOUS

PDF

112.0 KB Created: 2020-08-15 04:19:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d66fc7ea3c109115e4bf79abf22a914c SHA-1: 09160d13481f92a670ce9abd05604336eba112a6 SHA-256: d2798803efd9a3e636d7a35c577f34b0fdd7e729964e85c3a89cc400bd2cdb9a
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.com/pify?keyword=coroner%2527+s+report+public+record+canberra'. Another critical heuristic identified a PDF link farm, with 'https://cdn.shopify.com/s/files/1/0432/8793/7179/files/titoxelawefej.pdf' being the first identified URL. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains the redirector URL, suggesting a lure to external malicious content.

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.com/pify?keyword=coroner%2527+s+report+public+record+canberra
    • http://files.sanmateolimos.com/uploads/1/3/1/3/131383553/612544a.pdf
    • http://wumubatid.terryow-wingdesigns.com/uploads/1/3/2/3/132303382/nexuvevapiladeniduj.pdf
    • http://files.prayerlifemusic.com/uploads/1/3/0/7/130775876/bozomiminefoz-bumev-gifodidusit.pdf
    • https://cdn.shopify.com/s/files/1/0432/8793/7179/files/titoxelawefej.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vabagibad.pdf
    • https://cdn.shopify.com/s/files/1/0438/6488/3355/files/ischemic_stroke.pdf
    • https://cdn.shopify.com/s/files/1/0432/3164/1762/files/73026488472.pdf
    • https://cdn.shopify.com/s/files/1/0430/6596/6754/files/35068194798.pdf
    • https://cdn.shopify.com/s/files/1/0436/4884/3934/files/vixirob.pdf
    • https://cdn.shopify.com/s/files/1/0431/2137/7434/files/56681576545.pdf
    • https://cdn.shopify.com/s/files/1/0434/7727/0678/files/10th_maths_guide_new_syllabus_2020_20.pdf
    • https://cdn.shopify.com/s/files/1/0428/0126/6851/files/85651643001.pdf
    • https://cdn.shopify.com/s/files/1/0429/1906/7815/files/lukinifewupiw.pdf
    • https://cdn.shopify.com/s/files/1/0435/6472/8479/files/antoni_goubiew_bolesaw_chrobry.pdf
    • https://cdn.shopify.com/s/files/1/0437/7948/9946/files/volujob.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_off00017ca3.bin
14b32dd6a21100383e26775f83143e9756778967baa8100848815b4e1fa2177d
pdf-font-stream PDF embedded font (sfnt) at offset 0x17CA3 5148 bytes
font_01_sfnt_off00018e28.bin
46d47ca079265d812efebba6efbc91c2ebf63eab23a767ea91cc21899315d6db
pdf-font-stream PDF embedded font (sfnt) at offset 0x18E28 10600 bytes