Malicious PDF — malware analysis report

Static analysis result for SHA-256 555b5a750160cb51…

MALICIOUS

PDF

45.6 KB Created: 2020-08-17 04:46:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 2e2510a4a9d6c67cd15d66c6d31499c7 SHA-1: b1a476aee2ef3a5aafc1e1cae9edc0d151f2731a SHA-256: 555b5a750160cb5140f61d13e47c876db044112a1be20f4881398f036f43702f
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.com/pify?keyword=chevy+cruze+diesel+manual+regen In PDF document text
    • http://kejulido.dyslexiaconnectionsofnj.com/uploads/1/3/0/9/130968926/c2c30.pdfIn PDF document text
    • http://files.qigongchristchurch.org/uploads/1/3/1/3/131383486/fudupiwav_ladow.pdfIn PDF document text
    • http://files.jackandwinn.com/uploads/1/3/2/8/132815175/luwosudivokidux.pdfIn PDF document text
    • http://nudulotut.whd147.org/uploads/1/3/2/3/132303382/fegamafipod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5042/6787/files/97532982312.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7201/1941/files/33892933758.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5555/4458/files/80378852242.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2611/0885/files/ninomewomaviwu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5603/7017/files/que_son_factores_bioticos_y_abioticos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/bsc_mlt_books.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9117/9160/files/lijavumax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9181/2771/files/tuvafapinonitinifadirow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7235/6514/files/39062967784.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/9390/5828/files/all_formulas_of_class_11_maths.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5747/8809/files/67339318933.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8834/6262/files/32644325314.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1715/9335/files/22346874039.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7035 5468 bytes
SHA-256: d2b1fa1610b236c187baa87051aa6244c9cfed4c441bb5879b9c1b91fdb3c2f6
font_01_sfnt_off000082bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82BC 10760 bytes
SHA-256: a64fb3bc56a89ebbd4303901620bf789ee76b43c8efa3c79f874556c40a4ab38

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