Malicious PDF — malware analysis report

Static analysis result for SHA-256 b58c131b5ee240bd…

MALICIOUS

PDF

61.1 KB Created: 2020-08-23 08:46:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 780a96d473409520f486150c58051ce9 SHA-1: de36a6bb6ebef24e0e3cfd81a273b75f3b58f191 SHA-256: b58c131b5ee240bde9b3b51744e14924c064d11351e561fae42dc96ec21882d0
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with a critical heuristic identifying a malicious redirector at 'https://ttraff.ru/pify?keyword=autodock+4+manual'. This URL is presented as a download link for an 'Autodock 4 manual', suggesting a social engineering lure. The document body, though heavily obfuscated, also contains this URL. The presence of a link farm heuristic further indicates malicious intent to distribute links.

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=autodock+4+manual In PDF document text
    • http://files.hamabe-dojo.com/uploads/1/3/1/6/131636956/6085307.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/1/0428/5431/8239/files/how_to_change_language_on_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8956/7650/files/55791026783.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0091/2283/files/basic_bookkeeping_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2007/4663/files/nexafubolutar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99839510681.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7202/7814/files/jajibijeriju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4924/5079/files/dutujiwixumilanamo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/babai_abbai_songs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5093/3155/files/46914398507.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9899/5864/files/new_zealand_deck.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 1

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_off0000a60f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA60F 4668 bytes
SHA-256: 36210334bed394d2c21ad5c186b2d68baa4e00813706407514dabeb4718ba21a
font_01_sfnt_off0000b5d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5D3 10512 bytes
SHA-256: 80ada20195ad12095e39909dea38b812efb5edc2b2842b85e3be1c4735616571
font_02_sfnt_off0000d9bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9BD 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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