Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b281caffeb9780b…

MALICIOUS

PDF

47.4 KB Created: 2020-08-05 17:13:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5c20c6e6f616940e93d98b2a83e7209a SHA-1: 67786b737a682b1ea3ee6479a1524da154cfacc5 SHA-256: 7b281caffeb9780b6b279ac5adcb8f69233ec9a703760e20449a6a67936fc266
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple embedded links, with a primary link identified as a malicious redirector. This redirector is designed to lure users into clicking through to potentially harmful content, masquerading as a free download. The ML classifier strongly indicates maliciousness, and the presence of a link farm further supports a malicious intent to drive traffic to external 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.cc/pify?keyword=chol%25C3%25A9cystite+chronique+lithiasique+pdf In PDF document text
    • http://files.laingsburgbands.com/uploads/1/3/0/7/130775014/nezavuselomesebewuwo.pdfIn PDF document text
    • http://files.createandtransform.org/uploads/1/3/0/9/130969573/5402059.pdfIn PDF document text
    • http://files.quilledcards.com/uploads/1/3/0/8/130873851/vasenudipekodekis.pdfIn PDF document text
    • http://files.scoutingadventure.com/uploads/1/3/1/4/131453539/tebutazulo.pdfIn PDF document text
    • http://files.milkwelllactation.com/uploads/1/3/0/7/130739674/gamixu.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/1/0432/2639/8888/files/43565764207.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6422/0055/files/68615955931.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5122/1146/files/zefana.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9468/7400/files/guletabagu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0131/5491/files/81211567353.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2778/4103/files/70475832722.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0989/1742/files/69797996689.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2553/8965/files/3gp_mobile_movies_free_download_hollywood.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8458/6909/files/checkpoint_ccsa_r80_dumps.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2873/2314/files/xovekilun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78046530146.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0708/0605/files/83972880410.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2965/9805/files/91723220340.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 4

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_off00007497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7497 5516 bytes
SHA-256: f0ccb5688afb89f63dfb291f89748ba5036d49f76cd4613bc2494f87c01e393b
font_01_sfnt_off00008711.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8711 12584 bytes
SHA-256: 8ba0c5e1cdf8ee17ec74080980209b67f796e15c28f8d0adc0b0e7a262b706a8

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