Malicious PDF — malware analysis report

Static analysis result for SHA-256 4001556aecffeaa9…

MALICIOUS

PDF

40.3 KB Created: 2020-08-25 17:57:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 677e0d96532fc6f2785a4ce67611dc5d SHA-1: ea3b99acb7870d266399e2306bad9a936f17b28a SHA-256: 4001556aecffeaa924574de158b953b406788207fa2a121f7619b004aca10638
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com', which is used in conjunction with a search query for 'alcohol 120 offline installer free'. Additionally, it exhibits characteristics of a PDF SEO link farm, embedding numerous external links, many hosted on 'cdn.shopify.com'. The primary malicious IOC is the redirector URL, suggesting a phishing or malware distribution attempt.

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=alcohol+120+offline+installer+free In PDF document text
    • http://files.westwoodia.com/uploads/1/3/0/7/130776769/vematanajurisu.pdfIn PDF document text
    • http://pawatapaj.daankahmann.com/uploads/1/3/1/8/131871390/zugolilixum-nipexusevedex.pdfIn PDF document text
    • http://davituwu.meganmmoore.com/uploads/1/3/0/7/130738973/jufemeresigifodakug.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/1/0463/3044/5981/files/bajrangi_bhaijaan_film_hd.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7020/1760/files/82669228696.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/6449/9880/files/paburivodejolum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4739/4199/files/nesim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1905/7826/files/fusasotapedul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1850/1799/files/holes_louis_sachar_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6455/6710/files/skf_deep_groove_ball_bearing_catalog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9565/4554/files/sefagizupe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/7082322425.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1895/1576/files/tagevupasunewonojovunizud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0168/2843/files/bnmu_part_1_result_2019_marksheet.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

Related samples 2

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005efd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EFD 5284 bytes
SHA-256: 0407a054c08e260b1f0784e7755bee179fcbcbbea2cae72f91fd6f6f9167472b
font_01_sfnt_off000070e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70E4 10804 bytes
SHA-256: 6349413bc2405371b3eaa38b00f414fc4ee0bfeca57387d3c8a68da80925dbcd

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