Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e8ef2ed69dadd47…

MALICIOUS

PDF

43.1 KB Created: 2020-08-02 15:00:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0caf2eefa65bc509feb98fbb97c31cc6 SHA-1: ca2780d180a8d88fc89d405ad19d7010c85e3d3e SHA-256: 4e8ef2ed69dadd471b6dc185b53805b2e600edd5ef938ea2edd51809a1a10310
152 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to shopify.com, but one critical link directs to a known malicious redirector at 'ttraff.cc'. The document body, though heavily obfuscated, contains text related to 'snow goose migration reports 2016' and the malicious URL, suggesting a lure to trick users into clicking the malicious link. The ML classifier strongly indicated maliciousness, and the PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms the presence of a dangerous URL.

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=snow+goose+migration+reports+2016
    • http://files.californialightingconcepts.com/uploads/1/3/2/3/132303269/ea8a043c.pdf
    • http://files.killeenns.net/uploads/1/3/1/3/131380171/gisigeka-natuzuvonepe-xejexasitulokek.pdf
    • http://files.crownsofgloryw1gs.com/uploads/1/3/1/4/131437322/1105549.pdf
    • http://files.findingedenphotography.com/uploads/1/3/0/9/130969448/vazitade.pdf
    • http://files.sunilgarg3d.com/uploads/1/3/0/7/130739169/riwawejifedimox_gapamu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7905/7056/files/54091435799.pdf
    • https://cdn.shopify.com/s/files/1/0430/2562/9347/files/6sn1123_1aa00_0ea1_reader.pdf
    • https://cdn.shopify.com/s/files/1/0432/0880/2468/files/nadonagorimamipuvojuliw.pdf
    • https://cdn.shopify.com/s/files/1/0430/0334/7098/files/57762599882.pdf
    • https://cdn.shopify.com/s/files/1/0430/6662/2101/files/17642163213.pdf
    • https://cdn.shopify.com/s/files/1/0428/9980/0217/files/37771797557.pdf
    • https://cdn.shopify.com/s/files/1/0429/2270/5055/files/52238244654.pdf
    • https://cdn.shopify.com/s/files/1/0433/1608/4891/files/jigenu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2681/6932/files/79696317791.pdf
    • https://cdn.shopify.com/s/files/1/0432/5238/3902/files/tojeve.pdf
    • https://cdn.shopify.com/s/files/1/0430/2897/1674/files/kowarubekeviwaku.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/47692737462.pdf
    • https://cdn.shopify.com/s/files/1/0432/6552/3870/files/50462691.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_off000067e8.bin
f0d7e79d68c9c0c19a75da4cc1c376272c861bb46534e11cde292aeca084ed6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67E8 5780 bytes
font_01_sfnt_off00007b9c.bin
9a2c594e636ce2bc8a5d56bb464673e5c3ed74b8f5e3089c9775cbcdc4038b5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B9C 10528 bytes

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