Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6de8754ecf53ae7…

MALICIOUS

PDF

42.8 KB Created: 2020-08-01 14:55:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eeb2a7c9f2a0b327c89aa0c610131a8f SHA-1: d0cc004bcef87649403b465a76bd50e617b91e17 SHA-256: b6de8754ecf53ae750ce203f7216f8be2c25c3c2a22d10c82fa2c879d956c7bf
152 Risk Score

Malware Insights

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

The PDF contains a deceptive link that redirects to a known malicious domain, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the same lure text as the malicious URL, suggesting a social engineering attempt to trick the user into clicking the link. The PDF_SEO_LINK_FARM heuristic further suggests this PDF is part of a larger infrastructure for distributing 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.com/pify?keyword=naruto+shippuden+episode+371+english+dubbed
    • http://files.travelclinic.org/uploads/1/3/1/4/131483110/220afe00334e801.pdf
    • http://files.saskyafunsang.com/uploads/1/3/0/7/130775276/xizirotifanewo.pdf
    • http://files.messymommiesinthecity.com/uploads/1/3/2/6/132681985/zanozapedezoni.pdf
    • http://files.unboundtravelers.org/uploads/1/3/0/8/130873908/bb6f1a.pdf
    • http://files.ebenezermethodist.org/uploads/1/3/1/6/131637853/jisosusuxiwe.pdf
    • https://cdn.shopify.com/s/files/1/0433/3328/8088/files/70711587225.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9489/files/24315261825.pdf
    • https://cdn.shopify.com/s/files/1/0430/6301/7629/files/lojobejuwe.pdf
    • https://cdn.shopify.com/s/files/1/0434/5433/3093/files/82160339214.pdf
    • https://cdn.shopify.com/s/files/1/0432/5444/8286/files/dubuki.pdf
    • https://cdn.shopify.com/s/files/1/0431/6885/8280/files/fojejegima.pdf
    • https://cdn.shopify.com/s/files/1/0441/0173/0456/files/99755985043.pdf
    • https://cdn.shopify.com/s/files/1/0431/0119/2352/files/vefekagisenuvetonilova.pdf
    • https://cdn.shopify.com/s/files/1/0439/1626/3592/files/janifevezegenewadevi.pdf
    • https://cdn.shopify.com/s/files/1/0429/8221/1733/files/bozulejatasa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a1d.bin
d45428d05ebc599d5b0f4504142e10df0198d23bb36d3f983cea5a2f9cc8b689		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A1D 3332 bytes
font_01_sfnt_off00006609.bin
1bfe8dd27aa578de85da91983ff07bf9becc92222196aa06fa1c535116b0c7b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6609 5628 bytes
font_02_sfnt_off00007935.bin
86a158b6eb37229b9625be3819bbac542cbc9b36385ed676ae9e4ddb6acb689e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7935 10668 bytes

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