Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cceecb19698b58f…

MALICIOUS

PDF

51.1 KB Created: 2020-08-07 01:12:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9275f6038fdce18d8ba53b52b12fbc0 SHA-1: dd816b5777176286b452453296f1309d152f461c SHA-256: 9cceecb19698b58f751a16d324959dab11d74726528af8238bf6f169c404d767
150 Risk Score

Malware Insights

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

This PDF document is malicious, employing a link farm strategy to redirect users. The primary malicious URL identified is https://ttraff.com/pify?keyword=aok+sachsen+anhalt+bonusheft+pdf, which is a known malicious redirector. The document body, though heavily obfuscated, contains references to 'Aok sachsen anhalt bonusheft pdf', suggesting a lure to trick users into clicking the malicious link. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=aok+sachsen+anhalt+bonusheft+pdf
    • http://ruruwad.petersonclass.com/uploads/1/3/0/9/130969059/movoxuguwaseme.pdf
    • http://files.chicagobonebroth.com/uploads/1/3/0/7/130775509/99251e5966f7635.pdf
    • http://files.vancouverislandpremiumhardcandy.com/uploads/1/3/0/7/130740044/ninirovowabubu.pdf
    • http://files.tataoriate.com/uploads/1/3/0/7/130776073/3edc073f.pdf
    • http://disete.andartbybob.com/uploads/1/3/1/3/131398140/lejinifod.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nanejixiv.pdf
    • https://cdn.shopify.com/s/files/1/0439/1796/7528/files/kisimafawemimewixelegoru.pdf
    • https://cdn.shopify.com/s/files/1/0428/5258/1542/files/54742463580.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vaxopegi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2589/9426/files/honda_chf50_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/5840/5280/files/nonosoguruvofuniz.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/36507931529.pdf
    • https://cdn.shopify.com/s/files/1/0428/3033/2060/files/modenufobexezidewolip.pdf
    • https://cdn.shopify.com/s/files/1/0428/7509/3159/files/13656381399.pdf
    • https://cdn.shopify.com/s/files/1/0432/9606/3643/files/aufgaben_additionsverfahren.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/jufumuwilolazilisap.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_off0000880a.bin
a6063ef602e4c293f7fe604ce6afd011505f3cf1ee44c4c017ccf1b989b19149		 pdf-font-stream PDF embedded font (sfnt) at offset 0x880A 5340 bytes
font_01_sfnt_off00009a33.bin
c7627d9bd54fb846453f4d11e6f924ba99b7a9c67d66c94344f441473ef31109		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A33 10760 bytes

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