Malicious PDF — malware analysis report

Static analysis result for SHA-256 beb282f0f9fe01b6…

MALICIOUS

PDF

48.1 KB Created: 2020-08-15 01:08:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9876df454b04b1686e636847d9914c9 SHA-1: af85b258320e2f4c3e4850b9e5946f35ab957e80 SHA-256: beb282f0f9fe01b6889e3c77c5a4adad332cb1aec8aede7e0626dd8014045c2a
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/pify?keyword=best+answers+to+what%2527+s+up, which is also listed as a malicious redirector. The presence of numerous embedded links, many pointing to Shopify domains, suggests a link farm or SEO poisoning tactic to distribute malicious content.

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=best+answers+to+what%2527+s+up
    • http://files.mljammsenterprises.org/uploads/1/3/0/9/130969801/5531741d.pdf
    • http://tutarurek.abeautestale.com/uploads/1/3/1/0/131070420/jiperanore.pdf
    • http://files.thecaptainsblog.net/uploads/1/3/1/1/131163540/wovovoberenenafu.pdf
    • http://woxewexof.rileystevens.org/uploads/1/3/1/4/131438464/famuvi.pdf
    • http://sofibel.myccclive.com/uploads/1/3/1/4/131453858/darawejanubasa.pdf
    • https://cdn.shopify.com/s/files/1/0429/2935/6959/files/93993067858.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0486/files/95289565584.pdf
    • https://cdn.shopify.com/s/files/1/0440/5913/2054/files/rumamekegevigolusumopo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5556/2402/files/bawuvularudusa.pdf
    • https://cdn.shopify.com/s/files/1/0427/8750/4294/files/88364038458.pdf
    • https://cdn.shopify.com/s/files/1/0428/2135/3639/files/metaphysical_bible_dictionary_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/5124/5987/files/ludetu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7103/6822/files/42383930291.pdf
    • https://cdn.shopify.com/s/files/1/0432/4478/1735/files/firotezegamotogarusiw.pdf
    • https://cdn.shopify.com/s/files/1/0434/7668/0870/files/favored_soul_5e_unearthed_arcana.pdf
    • https://cdn.shopify.com/s/files/1/0440/0644/1110/files/jodufe.pdf
    • https://cdn.shopify.com/s/files/1/0438/1035/7405/files/dubininizarozusofux.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_off00007d5e.bin
87cb8459ba0ebd62d35fc97b9c666af76ae47fda4641126426553f0dc1c0f976		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D5E 5048 bytes
font_01_sfnt_off00008e9a.bin
71a2280c49f79b40170c14de99a1ee818efe093c29512b6b771646dc588062ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E9A 10704 bytes

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