Malicious PDF — malware analysis report

Static analysis result for SHA-256 79b5e91233f18a82…

MALICIOUS

PDF

41.8 KB Created: 2020-08-14 01:39:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a512d74af36aec3629204ba838878703 SHA-1: 068a0f85d325a0fc6c585067b7d35e2972a66c90 SHA-256: 79b5e91233f18a827be47df0f28af2ede26660edb1f248e5975d8fe63c3dd774
202 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirection and a link farm, with a critical finding of a link to known malicious redirector infrastructure. The document body and embedded links suggest a lure to download content, which is a common phishing tactic. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=aligarh+full+hd+movie++2016 In PDF document text
    • http://files.nofearlife.org/uploads/1/3/1/4/131453451/sekipilabesuj_xefewip_dafamofoveza_lefupe.pdfIn PDF document text
    • http://files.eastcoastcoachingandconsulting.ca/uploads/1/3/0/8/130813736/9318012.pdfIn PDF document text
    • http://rowuzi.nccsdonline.org/uploads/1/3/1/4/131453574/555456.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/1/0431/2186/8960/files/bopekotedupilovudomusi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7356/8919/files/fumaximifafaretijelusit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6499/1649/files/algebra_1_system_of_equations_word_problems.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4923/8178/files/bonebusijade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9782/6207/files/discord_rules_copy_paste.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4855/0050/files/96210168868.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5348/2137/files/xifuworebasu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/6461/9171/files/jeep_certified_pre_owned_warranty.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5866/7415/files/king_of_the_ring_1994.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7227/2037/files/osrs_f2p_magic_training.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2920/8983/files/2770338499.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8665/2316/files/86579964148.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8670/7876/files/anne_of_green_gables_musical_score.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_off0000556f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x556F 4036 bytes
SHA-256: 69fe5e6ba6e5692dfb2ff72cf15c9da4ec274696c925f803e8a59e989a588a65
font_01_sfnt_off000063ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63AE 5672 bytes
SHA-256: c965611a283b5c03e5ba5e0f7e459b07fce451917cfa5a229c1a32485a1f0594
font_02_sfnt_off000076e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76E6 10312 bytes
SHA-256: 5b097f5de933e164c683b6b9cb79b6d1799c24a0ad82800f8fe6089abb698c3d