Malicious PDF — malware analysis report

Static analysis result for SHA-256 c720061433cfa38b…

MALICIOUS

PDF

42.3 KB Created: 2020-11-02 22:12:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 17fbef3d0b5187e4b4d33a3b0045ffa8 SHA-1: eaa93b0c931bfa946e9ec7d860b5d8b6198bdbc9 SHA-256: c720061433cfa38be675c52fac9e5937a984b59781e15c8900f32422a05ba907
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous links designed to appear as a "Forrest Gump movie worksheet answers" document. These links redirect to a malicious URL (ttraff.ru) and a link farm, indicating a phishing or malware distribution attempt. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to trick users into visiting harmful sites.

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/123?keyword=forrest+gump+movie+worksheet+answers In PDF document text
    • https://xamonato.weebly.com/uploads/1/3/2/8/132814301/4690564.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374957/normal_5f8b3660c302c.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/9fa7699.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392195/normal_5f9fe4bbbfb47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369174/normal_5f879f357d218.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367633/normal_5f89786f91237.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369189/normal_5f9440a700eca.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/8276696.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444357/normal_5f9cd25e0ed02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365619/normal_5f8b3cfb2b34b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/welutizenop/rpg_vx_ace_rtp_is_required_to_run_this_game_error.pdfIn PDF document text
    • https://s3.amazonaws.com/bixumiburi/give_me_liberty_chapter_23.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/7808/2495/files/deep_blue_rub_copycat_recipe.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5005 5372 bytes
SHA-256: a5d7547432c65c37a11f52639bf3114227ad0ed4eb5b571af282b0b35e9db15a
font_01_sfnt_off0000623f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x623F 10688 bytes
SHA-256: 419c453ef88710f0bca114b1034a0d56b6065a5e25dbada5889ee48c8db42955
font_02_sfnt_off000086f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86F0 16144 bytes
SHA-256: f6e0f4a25f18a144688c6b7f40519a5efc98c72643b9054f89526e396d9b459d

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