Malicious PDF — malware analysis report

Static analysis result for SHA-256 830ccc9522ef910d…

MALICIOUS

PDF

46.3 KB Created: 2020-08-14 01:58:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b2455dbf0ce5e47131fcd2c3b2c2cccd SHA-1: d7fb320a0550307dbdb191bc59e2cf366549520b SHA-256: 830ccc9522ef910df77a120746ef88438ffe61d4a45884ad5f10e3af8e32866c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with a critical heuristic firing indicating a redirector to malicious infrastructure. The document body, though heavily obfuscated, contains a URL that points to a redirector, likely intended to lead the user to a phishing page or a malware download. The presence of a large number of external PDF links further suggests a link farm or SEO abuse for malicious purposes.

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=absolute+path+information+is+required+c%2523 In PDF document text
    • http://furizi.mostkreativeklassroom.org/uploads/1/3/0/7/130738909/lurigufamaz-gukarosadiloroj-kuvidubafivu-vizitusadewu.pdfIn PDF document text
    • http://files.dead-finder.com/uploads/1/3/0/8/130813141/b53d55292.pdfIn PDF document text
    • http://fajebu.bac4training.com/uploads/1/3/0/9/130968996/3834a7bf135.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/1/0431/3301/0081/files/jufirizutasikunuroxuxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2484/0861/files/gifunadefitenabomim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65105912314.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8719/0430/files/82045000682.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7868/0730/files/59130389182.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2610/2947/files/jojilijonodifejabemuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/63032467643.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2031/9893/files/12799652731.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9899/5864/files/52671732107.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4430/5061/files/6260480579.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8022/8759/files/sample_html_files.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 2

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_off00007749.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7749 5652 bytes
SHA-256: 2a69853cee850cc87cbd0bc51e49b464ae41dc4815c815c7908b94b64660f966
font_01_sfnt_off00008a3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A3D 9896 bytes
SHA-256: 8ffbbf495b96c296c7ab3014b473b6b67f362e6b2196c9d9ecc9c483417c6c50

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