Malicious PDF — malware analysis report

Static analysis result for SHA-256 99b581fa5fe5107e…

MALICIOUS

PDF

61.0 KB Created: 2020-08-21 07:28:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3a5014f14d9391d5f50c966ddb01b779 SHA-1: 811c75f4d051322f7bc2b57dd63189463afc52b5 SHA-256: 99b581fa5fe5107e59194b7f7aace027b1d4a41ba279b5fbdb4ad23843a6fcd5
202 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which point to a redirector service. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a 'curriculum vitae template photoshop'. This suggests a phishing or social engineering attack aiming to redirect users to malicious content. The presence of numerous PDF links also indicates a potential link farm for SEO manipulation or distributing further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=curriculum+vitae+template+photoshop In PDF document text
    • http://rulimu.gulfbeacheslibrary.org/uploads/1/3/1/4/131438025/numixa-vojabegixeju-muxokubu-sufufibu.pdfIn PDF document text
    • http://files.circuscascadia.org/uploads/1/3/0/7/130775727/e055575018533d.pdfIn PDF document text
    • http://vopelodu.powerandhealing.com/uploads/1/3/1/6/131606349/zoboverokofijeze.pdfIn PDF document text
    • http://mukona.bayareaflightinstruction.com/uploads/1/3/0/9/130969690/zakadogamov.pdfIn PDF document text
    • http://files.drainsmith.com/uploads/1/3/0/9/130969545/josivimedexu.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/1/0436/0539/3571/files/jnu_admission_result_a_unit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6508/9941/files/89801138932.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5687/1062/files/44845778218.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1986/2179/files/radio_news_reporter_job_description.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8353/0407/files/coffeescript_iterate_array.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1459/2408/files/57502020557.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3813/8783/files/vsepr_theory_file.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8640/5029/files/budget_speech_2019_zambia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3810/6023/files/no_excuses_brian_tracy_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1899/3307/files/65806822935.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5651/9585/files/lemalujokogapeze.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b2aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2AA 5140 bytes
SHA-256: f83f89aca30d636e7a30ff4e33f6eb800949c10777b00b13d5565fcc054ac36a
font_01_sfnt_off0000c3fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3FC 10296 bytes
SHA-256: 01e70bf403b8f21440c60e40b734d0e26aa7abe734a211efb25433866d877058