Malicious PDF — malware analysis report

Static analysis result for SHA-256 633621aa622bf8c6…

MALICIOUS

PDF

49.4 KB Created: 2020-08-23 12:41:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 192bd343be3427c90825cd6e1e19d75c SHA-1: 2b6ada4b7aa0b186b87dfa36dbcaabfc1cb25329 SHA-256: 633621aa622bf8c60589e2ddeeddde9dc9215aae1778784d4944fafd1c2d58b6
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the one identified by the heuristics, suggesting a phishing or scam lure. The presence of numerous links to external PDFs, many hosted on Shopify, indicates a link farm designed to attract traffic, with the primary redirector pointing to a malicious domain.

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=kumano+kodo+self+guided+walk In PDF document text
    • http://supiwon.the-nature-atelier.com/uploads/1/3/2/6/132682974/takotobabi.pdfIn PDF document text
    • http://files.face2facewithhorses.com/uploads/1/3/1/3/131379540/2855727.pdfIn PDF document text
    • http://files.showbizsosyal.com/uploads/1/3/1/3/131398184/nejozana-vabikukojalevo-netidenavazi.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/1/0428/8439/9270/files/77204926272.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4986/0765/files/bollywood_movies_2019_free_3gp.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5396/4712/files/belimo_damper_actuator_pdf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7140/6234/files/janatha_garage_telugu_movie_ringtone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4065/2960/files/69695016908.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0668/0484/files/bhu_bsc_entrance_syllabus_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9658/1020/files/98266009226.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0457/5130/4348/files/volapomosorofonopijuwuxod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8691/3442/files/the_accountant_movie_hd.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6382/8895/files/39536265076.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9980/8149/files/vimikugifaliru.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8002 5256 bytes
SHA-256: 507cfdf617cb72f3645123a27a337e467ff1890e1301552889a413c5971918f4
font_01_sfnt_off000091e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91E4 12156 bytes
SHA-256: 0c9ad0011034f83a29a3f71c341c5b0f6d45b26598af6fcb871708619f176a47

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