Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5fbbcd08991a25f…

MALICIOUS

PDF

40.0 KB Created: 2020-08-22 19:38:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 52e94d8cbc0d2857fdf1f566747ebfc8 SHA-1: 5b424f280e24090b08c5a0942318d9ed3b39a063 SHA-256: f5fbbcd08991a25f6ca15be32f98a2784113f60e2c8763c81aa622b3b422af68
194 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to a malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to 'rrb mumbai alp answer key direct link' and the malicious redirector URL. The PDF_SEO_LINK_FARM heuristic indicates the presence of numerous external links, suggesting a tactic to distribute malicious content or SEO manipulation.

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=rrb+mumbai+alp+answer+key+direct+link In PDF document text
    • http://files.fumcrutherfordton.org/uploads/1/3/2/6/132695663/kozesekonib_wikuko_xazitodugifilog.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/1/0427/9474/6023/files/lejujiwajopiwuzidafa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3826/8827/files/15550084219.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3346/7808/files/laporan_kasus_orchitis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3264/9636/files/10361299489.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8850/1143/files/gegofojafimorupamux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/4429/6088/files/ludiposabirufisefa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6248/4383/files/nobid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/69865881622.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4647/8758/files/28605337278.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9299/2410/files/juxanod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4953/4111/files/zasupesiwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5059/8562/files/burrhus_skinner.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 4

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_off00005e0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E0F 5624 bytes
SHA-256: d47ae5ded81ed7a362f679f62b04c9ba62df5c03ce8c76d805757c87e11bb3f8
font_01_sfnt_off0000711c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x711C 9960 bytes
SHA-256: 6c049e6c3553b96e5618f2108711dafbc223b504e39446a76bdf384b0eddc4d8

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