Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dec443c6b606cf8…

MALICIOUS

PDF

43.5 KB Created: 2020-08-07 05:29:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2fb01e72652a57379ec0d7b32c27cee5 SHA-1: c50a50795f3e2890d0332dedb5b692e1550f69a9 SHA-256: 9dec443c6b606cf87c03eed8e16787cecd6fd82f1b510001c083a1f826c0c613
152 Risk Score

Malware Insights

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

The PDF document was flagged by a critical heuristic for linking to known malicious redirector infrastructure. Additionally, it contains a large number of embedded external PDF links, suggesting a link farm designed to distribute malicious content. The ML classifier also strongly indicated maliciousness. The embedded URL 'https://ttraff.cc/pify?keyword=carryon+my+wayward+son+tab+pdf' is a primary indicator of malicious intent, likely serving as a gateway to further malicious sites.

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=carryon+my+wayward+son+tab+pdf
    • http://files.chriswilkersonchiropractic.com/uploads/1/3/1/0/131070160/1f524b0a.pdf
    • http://files.bartholomaeusofsalerno.org/uploads/1/3/1/4/131437873/4990185.pdf
    • http://lokif.maddiebooks.com/uploads/1/3/1/1/131164250/5181763.pdf
    • http://files.keithcossey.com/uploads/1/3/0/7/130739284/gojipedeleku-mexelu-fetotawavit-kakatonakotukan.pdf
    • http://files.blancoballet.com/uploads/1/3/0/8/130874110/wamabakomifulabodit.pdf
    • https://cdn.shopify.com/s/files/1/0434/3024/8600/files/28715371246.pdf
    • https://cdn.shopify.com/s/files/1/0429/7719/8229/files/farabufud.pdf
    • https://cdn.shopify.com/s/files/1/0429/4678/9542/files/weketudupepabik.pdf
    • https://cdn.shopify.com/s/files/1/0436/2482/4995/files/12121299866.pdf
    • https://cdn.shopify.com/s/files/1/0434/6091/9446/files/felozakobow.pdf
    • https://cdn.shopify.com/s/files/1/0431/8904/3358/files/77195502925.pdf
    • https://cdn.shopify.com/s/files/1/0438/2975/6064/files/best_cydia_tweaks_ios_7.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/55781022724.pdf
    • https://cdn.shopify.com/s/files/1/0430/9748/9572/files/mods_para_minecraft_1._8_1.pdf
    • https://cdn.shopify.com/s/files/1/0428/5969/2198/files/70534174200.pdf
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/riwewikalebipitaberug.pdf
    • https://cdn.shopify.com/s/files/1/0434/2785/6536/files/93732475173.pdf
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/ralink_technology_corp.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_off000061be.bin
7affc98da2b25331a4a6c6d9b3b29e61dbf09990316cb25adcdd58f600301007		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61BE 5392 bytes
font_01_sfnt_off0000740f.bin
655f7fc685afd76d3d88d118a0bcdb7c71b630e103e21d17f161ce841ee311d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x740F 14388 bytes

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