Malicious PDF — malware analysis report

Static analysis result for SHA-256 5aa5eb38abe462d4…

MALICIOUS

PDF

53.1 KB Created: 2020-08-14 07:56:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 73468369bce7307f7b315e34894dbc2c SHA-1: f929028218946c48e50ce807ffc39b53e7edf390 SHA-256: 5aa5eb38abe462d4f689286a463fd5aa294f398bc12c74b30086ddb4acbb83a0
194 Risk Score

Malware Insights

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

The PDF contains a lure related to Android development, directing users to a redirector URL. This redirector is likely part of a phishing or malware distribution scheme. The presence of numerous links to external PDFs, many hosted on Shopify, suggests an attempt to create a link farm for SEO manipulation or to obscure the final malicious destination. The ML classifier strongly indicates 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=android+room+database+multiple+tables In PDF document text
    • http://files.nisanifarm.com/uploads/1/3/1/4/131437859/favexupajewobid.pdfIn PDF document text
    • http://turadar.dirainternational.com/uploads/1/3/2/7/132712116/paledifepe.pdfIn PDF document text
    • http://files.chinookaircraftsales.com/uploads/1/3/0/7/130775743/254ba8630f243.pdfIn PDF document text
    • http://letoxu.jpzproducts.com/uploads/1/3/0/8/130814328/2ba329.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/1/0432/4317/6091/files/sojaxiri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0610/6528/files/35683236871.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2496/6044/files/75116186792.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6295/1077/files/36863608169.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4506/8699/files/pananan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8553/6161/files/tuguvanekosikozivugalune.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9403/2040/files/5980089460.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4842/6910/files/leriretanedatilesa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4292/0865/files/68377844945.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7083/3319/files/nobozekuzez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5366/2883/files/sazujenowigufunudufowil.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_off000091f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91F1 5236 bytes
SHA-256: 5c6dafe18ba0a6908e7ae9188dcf149a06f3f3e03de474361fa83bb9f53bd4b9
font_01_sfnt_off0000a397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA397 10564 bytes
SHA-256: 49a6498dd81ba6294118d7a771448a765dba46e0c01935acc5c8ed44d1e5a171

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