Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6351c5f1a6f7097…

MALICIOUS

PDF

41.6 KB Created: 2020-08-06 10:56:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 31a9c492380f95fa5f675d0fb44930da SHA-1: bc3c30fb688b8e9277a69be45b7eec23be2dc8e9 SHA-256: e6351c5f1a6f7097cf3e18bf89c711471d9d762740944fa77d903ade97d8024d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF file was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits characteristics of a PDF link farm, embedding numerous external links, with one pointing to a malicious redirector. The document body, though partially corrupted, contains the URL that triggered the malicious redirector heuristic.

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.ru/pify?keyword=alphabet+anglaise+pdf In PDF document text
    • http://files.wanderingcowfarm.com/uploads/1/3/0/7/130775866/bapem.pdfIn PDF document text
    • http://files.winterfarmmd.com/uploads/1/3/1/0/131070144/5eb4b94.pdfIn PDF document text
    • http://files.coonrapidssnowflakedays.com/uploads/1/3/1/3/131380687/zabamulikikisakina.pdfIn PDF document text
    • http://files.fishsmarttackle.com/uploads/1/3/0/7/130775429/1c3fdf3.pdfIn PDF document text
    • http://files.interiormotivesconsignment.com/uploads/1/3/1/4/131453188/lowowumi-lotijijix.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/1/0437/3810/3962/files/sedeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6670/1477/files/binary_text_converter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2707/1130/files/51375318591.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0477/1999/files/45311795833.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0681/1560/files/affective_computing_rosalind_picard.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8978/8069/files/terolezujoginozivikolumij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8543/6830/files/multivariate_statistical_methods_a_primer_manly.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9894/8255/files/91461379163.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2199/7979/files/fizimad.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 6

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_off00005984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5984 5336 bytes
SHA-256: 7386e3ad33b3d3fa0fd1ccc32ba13f781b7457f0660966ccbc5ce2c3f7aeca3c
font_01_sfnt_off00006ba9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BA9 14724 bytes
SHA-256: 93b1e7b04fcfc898f01801452d846f7510d9ddfb864ffe26a296220243747cc7

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