Malicious PDF — malware analysis report

Static analysis result for SHA-256 097a0c1c8f825ccf…

MALICIOUS

PDF

44.7 KB Created: 2020-08-06 04:53:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e229557e6fa342fd1e9c5e8ab9f8877e SHA-1: 749bd2387865cb731015cf6004b66f4b7a2c6576 SHA-256: 097a0c1c8f825ccfa1440c3abbd6c729ae9fd73716ec4a668ea46ea141c1ad16
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a prominent link that redirects to a malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. This link is presented as a download for a "Pathfinder bestiary box pdf", suggesting a social engineering lure. The PDF also contains a large number of external links, many of which point to benign Shopify URLs, but the primary redirector is malicious. No scripts were extracted, but the presence of malicious redirector links indicates an attempt to lead the user to a compromised site.

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=pathfinder+bestiary+box+pdf
    • http://files.treasuresinthevalley.com/uploads/1/3/1/4/131407010/566527f.pdf
    • http://jopomowe.absolutetime.net/uploads/1/3/1/6/131637016/5b626.pdf
    • http://files.grahamsoutheast.com/uploads/1/3/0/7/130775195/rilidewariluto_vaxutofel.pdf
    • http://files.shawnescott.com/uploads/1/3/0/8/130874668/navonolenemo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/8626/3960/files/convert_to_word_via_adobe_reader.pdf
    • https://cdn.shopify.com/s/files/1/0434/2464/5272/files/23280628537.pdf
    • https://cdn.shopify.com/s/files/1/0438/3942/2624/files/4bt_crate_engine.pdf
    • https://cdn.shopify.com/s/files/1/0427/5827/5238/files/github_commands_terminal.pdf
    • https://cdn.shopify.com/s/files/1/0431/0535/3889/files/77297283703.pdf
    • https://cdn.shopify.com/s/files/1/0437/0015/8629/files/bali_map_tourist.pdf
    • https://cdn.shopify.com/s/files/1/0435/6525/2771/files/accounting_information_systems_romney.pdf
    • https://cdn.shopify.com/s/files/1/0433/9440/0414/files/buell_xb12_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/5348/2135/files/sisegurodosafidimevir.pdf
    • https://cdn.shopify.com/s/files/1/0431/7937/6798/files/liwekasokaxigiku.pdf
    • https://cdn.shopify.com/s/files/1/0434/9375/2997/files/37556371737.pdf
    • https://cdn.shopify.com/s/files/1/0436/2820/0096/files/96014186574.pdf
    • https://cdn.shopify.com/s/files/1/0431/6132/1634/files/wifonewezunonupamalobo.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000657b.bin
8f928bb69271cd4e720d400ac2f6abdc3c379df2bba46aafee485e921de0cf4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x657B 5408 bytes
font_01_sfnt_off000077e0.bin
ad7838ebe60401787c6b13573fea85ffdb91bcd236268c80e1fa3c2c302fcdd6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77E0 14956 bytes

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