Malicious PDF — malware analysis report

Static analysis result for SHA-256 1109a7535f7bf584…

MALICIOUS

PDF

56.7 KB Created: 2020-08-23 09:17:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 9d2c8f2a531adafdea06cfd55a60474e SHA-1: 2f0dbd4c062c558f191e35f46f16738d16abaf6e SHA-256: 1109a7535f7bf58408e730ba0d24c553ff64c52858e9543bc715dadd087e7973
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.ru/pify?keyword=android+notification+tutorial+2019 In PDF document text
    • http://files.moabrecycles.com/uploads/1/3/2/6/132682607/mudagabevuki.pdfIn PDF document text
    • http://files.bayareaplacentaservices.com/uploads/1/3/1/4/131453395/pizazewuvadi.pdfIn PDF document text
    • http://xokaga.dancehampton.com/uploads/1/3/1/4/131407995/jetivugudus-zojijig.pdfIn PDF document text
    • http://files.sportpic.co.il/uploads/1/3/1/4/131453188/23da2ab099867.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8113/7316/files/nujonipiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7997/5591/files/raniwo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3706/4354/files/23029489661.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7376/3496/files/oxford_discover_grammar_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7764/1116/files/hay_day_game_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2886/5446/files/72306269202.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5868/3291/files/nijitomufumagu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5222/6974/files/41397077357.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4672/1946/files/nabofugafurutokagitoxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1875/3947/files/analytical_reasoning_questions_and_answers_for_interview.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0663/1833/files/voruzaronaras.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4748/3557/files/minecraft_if_power.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2858/4347/files/tecumseh_carburetor.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000923e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x923E 5072 bytes
SHA-256: a59e05a836e232ce5a9e258a60b8a8b4d43ec8daa87609dbea5767dd872cfb97
font_01_sfnt_off0000a37b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA37B 11048 bytes
SHA-256: 06cc8589391d7ca56e3f6e59534bc39111c5824bff115a8a2ff5338f6edd22ed
font_02_sfnt_off0000c79e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC79E 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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