Malicious PDF — malware analysis report

Static analysis result for SHA-256 835887c69731125b…

MALICIOUS

PDF

51.2 KB Created: 2020-08-14 06:26:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 00a25a37108421ce1d5d3b12457e548b SHA-1: c5dc0403e62aaffb13b80cd46714d2a0ff011d14 SHA-256: 835887c69731125b19f299e678b398779f9986dc2b31dd6f009988e201595555
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm designed to appear as free design resources, but it redirects to a malicious domain. The ML classifier strongly indicates maliciousness, and the embedded URLs are consistent with a phishing or scam lure. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=landscape+design+cad+blocks+free In PDF document text
    • http://fomanajaf.coreducate.com/uploads/1/3/1/4/131454526/zadulexim.pdfIn PDF document text
    • http://files.garfinkelseruya.com/uploads/1/3/1/4/131453512/zigunamopof.pdfIn PDF document text
    • http://files.wallowinginwords.org/uploads/1/3/0/7/130738875/doraxasafupezunuxilu.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/1/0433/4741/1096/files/31268619777.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2388/2664/files/resanurewewasaziwok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7812/3680/files/vowimaponerodabofipili.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3687/6695/files/como_converter_de_para_autocad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4868/8033/files/dark_souls_3_black_knight_weapons.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6203/4589/files/65374402280.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8622/3262/files/jalodusoxus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7837/5829/files/32060530061.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9151/6828/files/53506591658.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4895/9141/files/matoguwokivetavidebavux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7175/7718/files/27020542170.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2936/4885/files/lerebiduwimo.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F80 2952 bytes
SHA-256: e211f2d6e0d1bf1fd17bd5150bc2724fb7c0f1d37b1c69b855d9dcad8de34ab0
font_01_sfnt_off00005a0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A0E 5468 bytes
SHA-256: 90e054b2bf04b75834261fdaaedc786c9ea46e28a7cb67ba1374be5c4eb49c6e
font_02_sfnt_off00006ca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA8 3064 bytes
SHA-256: 57536cda9402271b270f33803f4aceca500124518471e8b55cfc18989ae14d64
font_03_sfnt_off000079b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79B2 15036 bytes
SHA-256: 39d98e002c7d169034f259ea05c7c83b4e6c63058e4a565e10845b681dbca9bd
font_04_sfnt_off0000a790.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA790 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848