Malicious PDF — malware analysis report

Static analysis result for SHA-256 9181dd55fa1ec365…

MALICIOUS

PDF

51.2 KB Created: 2020-08-23 06:28:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cb4c7775d1f09878c5cc9b64befbdbb5 SHA-1: 6d79314b1caf36dc47f6e628485de0d645453eeb SHA-256: 9181dd55fa1ec365077077213fc0400c2174c0d58d651f58d5a35145324ad741
194 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing a malicious redirector link and a large number of external PDF links, indicative of a link farm. The primary malicious URL, https://ttraff.cc/pify?keyword=animal+names+in+kannada+pdf, is likely used to redirect users to a malicious site. The document body contains obfuscated text and embedded URLs, further supporting the malicious intent.

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=animal+names+in+kannada+pdf In PDF document text
    • http://files.gemscorner.org/uploads/1/3/1/4/131482950/newomopugefesapuge.pdfIn PDF document text
    • http://files.southerncrossadvisors.net/uploads/1/3/0/7/130775998/83ea53.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn 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/1/0450/0927/2990/files/pendidikan_agama_islam_kelas_12.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0453/8872/6440/files/centrifugal_compressor_design_and_performance.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/behaviorist_theory_of_first_language_acquisition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/35031547028.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0954/8188/files/83843042231.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6193/5261/files/nukibes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4092/3048/files/east_anglia_train_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6731/8167/files/mercedes_c300_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2391/7478/files/38496790734.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9005/9176/files/7928748388.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9956/2911/files/luvilisu.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 7

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
stream_005_off00006686.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x6686 19828 bytes
SHA-256: dddba063b57cbfd716c786581ca490cddf3665c27add528a5607010115468d93
font_00_sfnt_off0000551e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x551E 5144 bytes
SHA-256: 79d69f9b46cbbeca19b668b3c3f370a72e2ca953b5f295670b0dedce8e6fe013
font_02_sfnt_off00008fc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FC6 15404 bytes
SHA-256: c1f18f70f2c32f27a6e350728976b11d8611d252a4f24a6835c6f45bffda4588

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