Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c108acf49c58d32…

MALICIOUS

PDF

49.5 KB Created: 2020-08-10 23:19:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 990b188e639a3ef0359c84dd0f045272 SHA-1: c573cc04d64dd79f98dbe6cd5ec68b71a749dc08 SHA-256: 4c108acf49c58d322ba9056bfe9839280752d93484475c61d5e6260afc4cd0ec
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One of these links, 'https://ttraff.cc/pify?keyword=advanced+java+interview+questions+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Advanced java interview questions pdf', suggesting a lure to entice users to click the malicious link. The ML classifier also strongly indicated maliciousness.

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=advanced+java+interview+questions+pdf In PDF document text
    • http://files.5271kofc.com/uploads/1/3/0/9/130969695/9186048.pdfIn PDF document text
    • http://files.thebigimportantfoodblog.com/uploads/1/3/1/4/131406629/ceba5bc479.pdfIn PDF document text
    • http://files.heartpieces.net/uploads/1/3/1/3/131379749/3776242.pdfIn PDF document text
    • http://files.backyardboyslandscaping.com/uploads/1/3/0/7/130775350/lorarerexodig.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/1/0429/5265/5002/files/pamabotimiwexovubikuzuni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4843/3829/files/shadowrun_renraku_arcology_shutdown.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5147/5351/files/bufovugisejibezobuji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2130/9851/files/nuwejuvaxewimina.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9823/4270/files/95062890664.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7259/3820/files/kuxakolepepurujo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7508/4193/files/23430195416.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6351/7092/files/fesusejepedosevefabar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8658/5749/files/82662745528.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/79265304831.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6916/1110/files/arpav_dolomiti_meteo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4413/4294/files/ielts_general_writing_task_1_samples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0110/1984/files/actinomyces_bacteria.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_off000081f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81F0 5460 bytes
SHA-256: 17e8b287447fa0d7ba0a8e137c7a09408766b44f203a6b73bff6611bb3889d24
font_01_sfnt_off000094a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94A9 10912 bytes
SHA-256: 4d07f45e4305541b071281fb78fd0b2723b749133b6aab341446d794c9b25fdb

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