Malicious PDF — malware analysis report

Static analysis result for SHA-256 842cca3253f26bad…

MALICIOUS

PDF

43.4 KB Created: 2020-08-19 18:19:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f058637b33fea9fddf1f97b653ef3cad SHA-1: dc402d10ae440f168e8f068a75ecce3a521ba8f6 SHA-256: 842cca3253f26bad845faf317cecf6f9b69a48da0003a03485a6189b33c6306e
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious domain, identified as a redirector for SEO-based phishing. The document body, though heavily obfuscated, contains a URL that appears to be a lure for 'treatment for allergic rhinitis'. The presence of multiple PDF links and a high ML classifier score indicate malicious intent.

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=tratamiento+para+rinitis+alergica+pdf In PDF document text
    • http://files.thewritemoment.blog/uploads/1/3/1/4/131409055/3256791.pdfIn PDF document text
    • http://files.especiallyforyou1.com/uploads/1/3/1/4/131409909/1319629.pdfIn PDF document text
    • http://files.crownandgloryministries.com/uploads/1/3/0/7/130776220/5151973.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/1/0428/9835/8432/files/32177526878.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4030/7362/files/pibajitomire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6472/9512/files/tedokarovorisivudurel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3051/8682/files/5902685771.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4166/7734/files/balanitis_tratamiento_2018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ganisififado.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7818/0257/files/27390614981.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5198/3772/files/48318769238.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9610/4348/files/sogofumuwokiwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8827/2807/files/rejexeni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7709/9935/files/94847407613.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/0250/6909/files/install_opencl_ubuntu.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 5

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_off00006a03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A03 5424 bytes
SHA-256: bb899ade8896e61f22f2abf8b671be244380d2f5873e7a1389f5ab2b17b25ea5
font_01_sfnt_off00007c58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C58 10540 bytes
SHA-256: 9fe433d8bf65582537d8d7dccaad94baa1ad282519c7a17a8d58718dd909564c

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