Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a4ab2b2cb46ba43…

MALICIOUS

PDF

44.9 KB Created: 2020-07-31 19:58:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7b402ace4373daa40205248ccbc3be0c SHA-1: 24bb5ee3fdba131d6f01541f06bf47a995102742 SHA-256: 5a4ab2b2cb46ba4392689a5340b7fd184e2915ed7dc8eb01af80e7ba1253df38
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous embedded links designed to create a link farm, with a primary redirector pointing to a malicious URL. The document body, though obfuscated, contains a reference to the same malicious URL, suggesting an attempt to lure users to a phishing or malware distribution site. The ML classifier strongly indicated maliciousness, and the PDF structure points to a link-based redirection attack.

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=bob+marley+jamming In PDF document text
    • http://files.teresele.com/uploads/1/3/0/7/130775704/feposuguninu.pdfIn PDF document text
    • http://files.nadi-haas.de/uploads/1/3/1/4/131406433/c8d82aec4f.pdfIn PDF document text
    • http://files.justjule.com/uploads/1/3/0/7/130775405/lubuwo.pdfIn PDF document text
    • http://files.taxjustice.uk/uploads/1/3/1/4/131437984/nunonesim_wugizigokuzoxu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/xebowinazimufitakovusa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2211/3192/files/88748662484.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89462818099.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2355/7030/files/gigopozebifevezifomux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2168/0283/files/bufute.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7366/6213/files/vefiduvexorivitowixupizas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0775/2861/files/98758497785.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6802/3194/files/26580847422.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2651/3048/files/31671532796.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4695/9261/files/product_report_card_reviews.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9242/6405/files/38112509621.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 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_off0000624e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x624E 4900 bytes
SHA-256: dac34bb6518a263f202a71519b26b5ab106eb4df3da4bbc73db142062686cde5
font_01_sfnt_off000072d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72D8 11992 bytes
SHA-256: 69b3c9d405bee3a05a8a0adc354e854cdaea2e131356cc360ab849faf3ad2d05
font_02_sfnt_off000098bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98BF 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

Open this report in the interactive analyzer, or submit your own file for analysis.