Malicious PDF — malware analysis report

Static analysis result for SHA-256 64043a7d209f9099…

MALICIOUS

PDF

43.5 KB Created: 2020-08-18 22:48:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e43b38d15037b5243672ae5a3accca34 SHA-1: 9bb82ae7adfbdfd06305bd86c27abf608a0eba32 SHA-256: 64043a7d209f9099b96058b0210ac7f1f927c1990402c3a6a2e20f0e846673f6
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including one pointing to a redirector at `https://ttraff.cc/pify?keyword=ccleaner+latest+version+filehippo`, which is flagged as malicious. The document body also contains this URL, suggesting a lure to download software. The presence of many external PDF links, some hosted on Shopify, indicates a link farm strategy. The ML classifier strongly flagged this PDF as malicious.

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=ccleaner+latest+version+filehippo
    • http://puxuxawo.kcsaussies.com/uploads/1/3/1/6/131636974/8795150.pdf
    • http://files.literateinaminute.com/uploads/1/3/1/4/131483234/1172960.pdf
    • http://duviwip.ubuntucourtyard.com/uploads/1/3/0/7/130775388/fevopazuvu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1888/7073/files/nedosotegafusatigov.pdf
    • https://cdn.shopify.com/s/files/1/0432/2358/0830/files/cahier_de_charge_d_une_application_mobile.pdf
    • https://cdn.shopify.com/s/files/1/0427/7967/2735/files/10792001579.pdf
    • https://cdn.shopify.com/s/files/1/0435/1809/9615/files/47137266304.pdf
    • https://cdn.shopify.com/s/files/1/0428/0057/8723/files/7604474115.pdf
    • https://cdn.shopify.com/s/files/1/0431/8117/9029/files/zekadeg.pdf
    • https://cdn.shopify.com/s/files/1/0434/8713/3860/files/53999151825.pdf
    • https://cdn.shopify.com/s/files/1/0430/1094/9273/files/jifozu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8180/9558/files/bowozetivevizabaf.pdf
    • https://cdn.shopify.com/s/files/1/0438/3699/7792/files/5691107376.pdf
    • https://cdn.shopify.com/s/files/1/0427/9212/4572/files/recreational_vehicle_clip_art.pdf
    • https://cdn.shopify.com/s/files/1/0435/0004/4454/files/radapobedovewuvugumiriro.pdf
    • https://cdn.shopify.com/s/files/1/0448/0250/6909/files/budget_speech_2020_south_africa_summary.pdf
    • https://cdn.shopify.com/s/files/1/0437/0412/3557/files/atls_american_college_of_surgeons.pdf
    • https://cdn.shopify.com/s/files/1/0437/2014/7095/files/nifodakifivatiranin.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_off00006dae.bin
29a1b39269bb827fb1dee653dc263f5ad5cb0d5cd281d124d4b6e9bb564cd506		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DAE 5068 bytes
font_01_sfnt_off00007ee7.bin
f765cc9466927c973b8e7569a31ef0b2003d626764a0a315af643f011871ed1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EE7 10052 bytes

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