Malicious PDF — malware analysis report

Static analysis result for SHA-256 63948d546e88895c…

MALICIOUS

PDF

46.4 KB Created: 2020-08-18 14:30:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 839cdd052ba7fb2acea0134c4842cbf7 SHA-1: 459eb1605d337dde0c5fe3fa526c7da1e06b02c1 SHA-256: 63948d546e88895cbbc2a517ed1b6ad4618c68f0717a94280086ba42fa1453e1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF was flagged as malicious due to a high number of embedded links, many pointing to external PDF files, suggesting a link farm or redirection tactic. One critical heuristic identified a link to known malicious redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a malicious intent to distribute content or redirect users, likely as part of a phishing or SEO manipulation scheme.

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=my+beauty+diary+mexico+cactus+sheet+mask
    • http://files.aroundthesunmontessori.com/uploads/1/3/0/9/130969551/sokokoriv_repised_kifurazezuvezun.pdf
    • http://zojanel.johnhenryiii.com/uploads/1/3/1/3/131384709/fewig.pdf
    • http://tasigeba.chelseadianephotography.com/uploads/1/3/1/6/131606490/fdf88c6c046.pdf
    • http://files.hollycho.com/uploads/1/3/1/4/131482976/gorotavisu.pdf
    • http://mijoda.thecheesewizard.com/uploads/1/3/2/6/132680813/8037902.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/5588/3175/files/xuvosivowajemokadani.pdf
    • https://cdn.shopify.com/s/files/1/0433/9240/1573/files/kekugijowifujugeva.pdf
    • https://cdn.shopify.com/s/files/1/0436/4288/0160/files/63653995607.pdf
    • https://cdn.shopify.com/s/files/1/0429/2398/3001/files/naruto_online_oasis.pdf
    • https://cdn.shopify.com/s/files/1/0434/8461/0712/files/nuxujinuvutomesibax.pdf
    • https://cdn.shopify.com/s/files/1/0437/1765/6731/files/gmail_address_book.pdf
    • https://cdn.shopify.com/s/files/1/0435/4208/5783/files/lebovol.pdf
    • https://cdn.shopify.com/s/files/1/0429/9869/4049/files/60338888593.pdf
    • https://cdn.shopify.com/s/files/1/0428/2338/5247/files/kutomifuturobox.pdf
    • https://cdn.shopify.com/s/files/1/0430/8077/7882/files/tusuz.pdf
    • https://cdn.shopify.com/s/files/1/0437/9122/0887/files/xulupavezakamedilodokolo.pdf
    • https://cdn.shopify.com/s/files/1/0434/7507/5225/files/animated_gif_in_latex.pdf
    • https://cdn.shopify.com/s/files/1/0432/4828/7912/files/34783623353.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_off00006a88.bin
8fd61dca056a36ea5a9fcb1be31968f8384c5192126cb1f697e7bcf8ddc697bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A88 5524 bytes
font_01_sfnt_off00007d26.bin
ffbda7e7cf3dd44514207e82d5b6ee7ce4e2c5c78293d625c242e8de513f0936		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D26 2416 bytes
font_02_sfnt_off000087e4.bin
0d38949858ee270f52d0babd9951680774540186297543d6207acf1a52bc18ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87E4 10676 bytes

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