Malicious PDF — malware analysis report

Static analysis result for SHA-256 081fab18dccbdb7a…

MALICIOUS

PDF

48.3 KB Created: 2020-08-07 19:57:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eea5aa1e0c52929fa47f88e6654e809c SHA-1: 73c074cc8f03cb7e365516e2404b11f19f519af8 SHA-256: 081fab18dccbdb7ab678e8d73b9a30c6489c05d13b660da81c10a676028e006e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a malicious redirector link and a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The primary malicious URL is https://ttraff.cc/pify?keyword=lista+de+numeros+en+ingles+pdf, which is flagged as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL and other Shopify links, indicating a potential lure to download further malicious content or to engage in SEO spam.

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=lista+de+numeros+en+ingles+pdf
    • http://files.stoneranchpta.org/uploads/1/3/0/7/130739116/4e9eff098.pdf
    • http://files.southforkwatershed.org/uploads/1/3/1/3/131384429/mifibepabi_muvokama_fimamarim_nibunonij.pdf
    • http://vamuxop.cocktailsnponytails.com/uploads/1/3/1/8/131856161/migilat.pdf
    • http://files.keanaturephotography.com/uploads/1/3/2/6/132681294/1919030.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/9280/3744/files/93027800128.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/minecraft_cops_and_robbers_2.pdf
    • https://cdn.shopify.com/s/files/1/0436/4677/9552/files/7096072348.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/les_berceaux_faure.pdf
    • https://cdn.shopify.com/s/files/1/0433/2745/5382/files/lubugokojozed.pdf
    • https://cdn.shopify.com/s/files/1/0427/8226/1415/files/79720469289.pdf
    • https://cdn.shopify.com/s/files/1/0443/9837/9174/files/sedabirifidepuluvi.pdf
    • https://cdn.shopify.com/s/files/1/0437/6225/3978/files/dupez.pdf
    • https://cdn.shopify.com/s/files/1/0432/2807/0052/files/jokikufuginexo.pdf
    • https://cdn.shopify.com/s/files/1/0430/2585/8711/files/45801202995.pdf
    • https://cdn.shopify.com/s/files/1/0440/4068/3685/files/konumekusanitavimavabe.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a20.bin
480ff3bf997dbc5c95f2d4c06a91b81e4eba057e5cc672181ec3ef41ec8dc739		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A20 5300 bytes
font_01_sfnt_off00007c0f.bin
51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C0F 1800 bytes
font_02_sfnt_off0000849d.bin
f2376e27a0cb87b92c725cdd1e44002c3be44c85853f3da6b6806fafb38b0c8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x849D 15108 bytes

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