Malicious PDF — malware analysis report

Static analysis result for SHA-256 f28314f7c8263f6f…

MALICIOUS

PDF

44.4 KB Created: 2020-08-10 06:23:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7f35833041a139a183556b1ae1c99a50 SHA-1: 7b21203d4147bd4735b62dca5c3d245b9f51b149 SHA-256: f28314f7c8263f6fd3749d5e20ba8d2c9636a9224e01d19b1386646019df30f6
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF contains multiple links to redirector domains and a large number of external PDF links, suggesting a link farm or SEO poisoning attempt. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document's content is designed to trick users into installing software, likely to facilitate further malicious activity. The embedded URL 'https://ttraff.cc/pify?keyword=pdf+file+reader+filehippo' is flagged as a malicious redirector, reinforcing the social engineering aspect.

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=pdf+file+reader+filehippo In PDF document text
    • http://files.christophertsmith.com/uploads/1/3/2/6/132682471/lotudise.pdfIn PDF document text
    • http://files.allrequestdjdave.com/uploads/1/3/1/3/131384401/d31c26.pdfIn PDF document text
    • http://kenoga.veldresienterprises.com/uploads/1/3/1/6/131606490/9163356.pdfIn PDF document text
    • http://files.frictiongloves.com/uploads/1/3/0/9/130969944/tepujelegu.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/1/0452/7413/6738/files/aql_standard_table.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4062/8120/files/boxisovavet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8646/2620/files/fafiweviw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3786/7680/files/12590030125.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8609/4241/files/bipojewobametumonoxofazo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/new_american_bible_catholic_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/41718344304.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2707/8052/files/bose_321_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8725/0087/files/61889706208.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/mapabodifogobifo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2383/4011/files/conversor_metros_a_pies.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8415/9903/files/how_to_check_mysql_version.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0874/3835/files/murigomosokoxobajeledin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4184/8470/files/surge_arrester_types.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_off00007233.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7233 4952 bytes
SHA-256: 04b8ebda76d7d96956c4b0331e7152b1493172bdb173f086a9d7f49d971cb5c1
font_01_sfnt_off00008304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8304 9776 bytes
SHA-256: 6ac24ad3f3a2a67c3a69ecf78341ca796e9f72fb17407e4bf253b811735289b2