Malicious PDF — malware analysis report

Static analysis result for SHA-256 61af440d43eeb2e8…

MALICIOUS

PDF

38.3 KB Created: 2020-08-18 18:56:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d5f51b2917be99ab74fb5e89caed1bc2 SHA-1: b9df1a3a1289ad4996246ba3b14a3821a6db084c SHA-256: 61af440d43eeb2e88dfe9b8f24f83b44c60e1300f60326a791c6ff0a7bb8ca8a
194 Risk Score

Malware Insights

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

The PDF contains a link to a redirector service, which is a common tactic for distributing malware or phishing content. The document body and embedded links suggest a lure to download a modded application, which likely leads to malicious content. The presence of multiple external PDF links further indicates a link farm used for SEO poisoning or traffic generation to malicious 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=army+of+darkness+mod+apk+revdl In PDF document text
    • http://files.psbproservices.com/uploads/1/3/1/4/131407823/lawoje_biwugorulataf_nerekom.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/1/0432/0637/7633/files/piputerojis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1016/9759/files/11480428994.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3304/2839/files/barron_s_ielts_listening_test_2_included.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7332/0600/files/wesufirajaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2865/9874/files/85219116530.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/1911/2345/files/statistical_analysis_microsoft_excel_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4583/8232/files/87314903585.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7152/7325/files/33143617572.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0730/2037/files/ryobi_gas_trimmer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0279/7986/files/ball_bearing_failure_analysis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2314/6906/files/lezokipezul.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_off00004409.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4409 5400 bytes
SHA-256: e800c1113ab457c0da7b633dfa1aa96ab3d8912821e325316a218cd601bb1a95
font_01_sfnt_off00005663.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5663 9672 bytes
SHA-256: 92130b9acefa297d19890f81edaec15aebcd5a33d92d04673e52ef01cc9fc99b
font_02_sfnt_off000077a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77A6 16060 bytes
SHA-256: bb4620ae2308066493f479cb0495314a41e91f5b0bfb2a754d9bad2ef34af03d

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