Malicious PDF — malware analysis report

Static analysis result for SHA-256 339245e1fa8d6895…

MALICIOUS

PDF

38.9 KB Created: 2020-08-17 13:53:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 660457c5c184b84cd6c017e44c5edf8f SHA-1: b176fd322ed64a4783f94de1dbd5aaba3c3444fe SHA-256: 339245e1fa8d6895bac4b3f5edfd81b9345a9621cb69d7c36e71573db38110cb
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=meiosis+review+worksheet+answers In PDF document text
    • http://files.soupsatthestation.com/uploads/1/3/1/3/131379578/kizizawedoz-tujul.pdfIn PDF document text
    • http://files.lizpawlak.com/uploads/1/3/1/1/131164250/3702165.pdfIn PDF document text
    • http://files.appletreecontractors.com/uploads/1/3/1/6/131607712/9709263.pdfIn PDF document text
    • http://files.worldiqchallenge.com/uploads/1/3/1/4/131438308/02dc5242.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/1/0428/6126/5062/files/personal_finance_11th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5350/4917/files/shrimad_bhagwat_geeta_in_telugu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/8101/1093/files/35157713468.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2509/7126/files/arjun_reddy_video_songs_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6450/0122/files/short_textbook_of_anaesthesia_ajay_yadav_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6241/7825/files/novew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2368/7067/files/30657887074.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1212/6882/files/lightroom_app_new_version_mod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5520/9879/files/86862236570.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_off000059ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59AB 4960 bytes
SHA-256: 86a17cd5f2d0911a7e210ce1b0f0333bdc147fda1a5521b2d12bc1c6cb71d0f5
font_01_sfnt_off00006aa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AA1 10152 bytes
SHA-256: ffece729948e03fa104214ee7a0db4fc292aa8eb6fcfb001d4f1c3addda3f860