Malicious PDF — malware analysis report

Static analysis result for SHA-256 c16aa1985377c9c0…

MALICIOUS

PDF

43.9 KB Created: 2020-08-10 04:19:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 33d33f86421d67205c55c9cba622c88f SHA-1: 90fa3e55db4a527eff5ef969bd3b243f0b60391d SHA-256: c16aa1985377c9c0196f8378160d790293f02620bf2e83fe0a6a5ecb5bcc4d3e
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily corrupted, contains text related to 'Alimentos ricos en hierro para la anemia ferropenica pdf' and the malicious URL, suggesting a lure to a site that likely hosts further malicious content or phishing pages. The presence of a link farm heuristic further supports the malicious intent of directing users to external resources.

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=alimentos+ricos+en+hierro+para+la+anemia+ferropenica+pdf In PDF document text
    • http://files.plantwisdomgardencenter.com/uploads/1/3/0/9/130969904/xigozazanigujelak.pdfIn PDF document text
    • http://files.realinboundconsulting.com/uploads/1/3/0/7/130776444/cc995b2e973a7f7.pdfIn PDF document text
    • http://files.homelesshaventv.com/uploads/1/3/0/8/130873876/bd7e6ca764.pdfIn PDF document text
    • http://sopojuset.itsyoursnapshot.com/uploads/1/3/2/6/132680813/7711552.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/1/0429/6556/5589/files/losaxizisimigoki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0505/8976/files/kivukep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4883/6004/files/clearance_hole_chart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4647/5678/files/water_genasi_dnd_5e.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9857/8848/files/64827840946.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nalekubaserigudopen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3183/0421/files/vepemejemimujepob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9306/4870/files/kumumudal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7437/8142/files/reassembly_ship_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mejiwevabefi.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_off000069a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69A9 5384 bytes
SHA-256: 119a92d810d92c13f9ff0c6ea3b20d5f0642bf9ae6aaaaa63c9a20e5c6958802
font_01_sfnt_off00007bcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BCF 11332 bytes
SHA-256: 90e1677113104baed0c4740a21c7f7d399f4a74e71f3e6cfe51c97d659ce8a1b

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