Malicious PDF — malware analysis report

Static analysis result for SHA-256 a55679df2e5ae699…

MALICIOUS

PDF

51.8 KB Created: 2020-08-10 19:39:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 812e299186e86a9fdc8d0bccca1455cd SHA-1: 8eb22d15b5aa5130a30c128853ff20cd943a189c SHA-256: a55679df2e5ae699e6553b249d6a6def3cba5ebd9d18ac9c247413b885683f4c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with one critical heuristic identifying a link to a known malicious redirector. The document body, though partially garbled, suggests a lure related to 'Java struts interview questions and answers pdf'. The presence of a mass external PDF link farm further indicates a malicious intent, likely for SEO manipulation or to direct users to malicious sites. No scripts were extracted from this sample.

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=java+struts+interview+questions+and+answers+pdf In PDF document text
    • http://kupegoz.margaretshiver.com/uploads/1/3/1/3/131380213/ed29972.pdfIn PDF document text
    • http://files.humactive-formation.com/uploads/1/3/0/9/130969984/ziraxo.pdfIn PDF document text
    • http://besak.kasiaclarke.com/uploads/1/3/0/7/130776791/zavuliwit_lazokiba_sijiduligiv_wajagod.pdfIn PDF document text
    • http://visemix.majesticrc.us/uploads/1/3/0/8/130813528/silarefuzizig.pdfIn PDF document text
    • http://files.lilrascalsrefuge.org/uploads/1/3/1/6/131637279/4781478.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/1/0439/7246/0702/files/sony_annual_report_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4223/2725/files/xiwut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6529/4504/files/mubanizopatenumudogeziw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3559/8758/files/ralirifir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2522/5112/files/zetomowuxofejer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4091/3061/files/zavatudiluw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3702/2615/files/zanivujojegi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8423/4398/files/lajidipowolalogedaguko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3798/2869/files/xoxatid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1435/7145/files/14787840131.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6841/5400/files/digijomaso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5804/4823/files/treatment_of_chronic_liver_disease.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_off00007fc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FC8 5268 bytes
SHA-256: dbb531a15f26df2fba991fc1186a681628f0c18daabc6e27e38f3437e05a0cb2
font_01_sfnt_off000091d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91D9 15484 bytes
SHA-256: 4f7b66046e4a7e61d890fc3fcff020f7aef04831d11ba5412a9decdeca25eb88

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