Malicious PDF — malware analysis report

Static analysis result for SHA-256 cea42c0b34853aa9…

MALICIOUS

PDF

42.1 KB Created: 2020-08-25 03:54:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: dfa1bf91aaea5463d23932764f660ef0 SHA-1: 5cc4cbdbe10ea0dc24ed299c7b7d46698c4f778c SHA-256: cea42c0b34853aa958143cf9ddb99b0d5b57198c1aab9565ef5f147754864f90
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=4558+smd+ic+datasheet In PDF document text
    • http://lexaz.bayareabeattv.com/uploads/1/3/0/7/130776891/7419937.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/1/0438/4335/4781/files/animation_maker_windows.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2916/8282/files/taselokerofuwoposavew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3655/7987/files/changeling_the_dreaming_2nd_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9282/6517/files/muworoligofifidewulo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1407/9143/files/gezatolas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1287/1576/files/bluestacks_free_for_laptop_windows_8.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7423/1199/files/stevens_jax_twitch.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7539/3946/files/42597929069.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0910/6335/files/revitawepiwutaja.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_off00004e2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E2A 4068 bytes
SHA-256: 0e98be67eba76635c4b8fe859c6685a7f8be9ebe5c5fe1cf367e745f4f5b5c2f
font_01_sfnt_off00005ca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CA2 5364 bytes
SHA-256: b78f3abfebfb0f61fa26819f194a5263c940f9c276434389686adfe5b9c3af37
font_02_sfnt_off00006ebe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EBE 14644 bytes
SHA-256: af83be722248f0595b02984f340d83e79fbf45ab54a75f63d7e808573d5786e0