Malicious PDF — malware analysis report

Static analysis result for SHA-256 da668b7359864a52…

MALICIOUS

PDF

70.0 KB Created: 2020-10-17 10:43:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 8eb6c1734254a7f970f4695a1677b7ef SHA-1: 38bfa64ac034efbf6b9744611fcb9ae398f2ffec SHA-256: da668b7359864a52cdb9dea55420f54d1580952c52eb1413ed4e8593eaaf316c
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.club/123?keyword=post+natal+exercise+for+caesarean+pdf In PDF document text
    • https://bizetuxerupa.weebly.com/uploads/1/3/0/8/130873791/wigexulogebarovufamu.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/lonevu.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/1/0440/3652/2149/files/blu_life_one_x3_user_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6847/0936/files/49532942733.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2041/1303/files/nodelegipekax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5795/4464/files/59164236983.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6675/2164/files/sleep_number_flexfit_adjustable_base_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/311d5785-76f7-410c-8acb-a0d72b232eaf/11987355433.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20ca7275-baa0-49cc-aff6-e2772e2bbe6e/mupebugoxapimixa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f09be686-c134-4547-826f-c0a4f90ee701/39195589962.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/2209/3983/files/70665026362.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/0185/0273/files/xixesi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7031/9509/files/word_whizzle_ends_in_n_answers_animals.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/7758/0962/files/identifying_geometric_shapes_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2743/0059/files/selective_laser_sintering_sls.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/6571/3055/files/3115194843.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_off0000d502.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD502 5216 bytes
SHA-256: 6b50936a146012066276f319aed75112f00572ca344472f9347dd62857e9ab74
font_01_sfnt_off0000e6d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D0 10572 bytes
SHA-256: 3bc8376aebd620faa23b0a6b1b1ebe42230a36ea8dc088ec0a1f491be44b134e

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