Malicious PDF — malware analysis report

Static analysis result for SHA-256 8911f51b581838d9…

MALICIOUS

PDF

137.6 KB Created: 2020-11-01 04:58:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1c580691a2b104e48942879a7210f76a SHA-1: 04d0ae3c10c19c64cf563cc695855684643448b6 SHA-256: 8911f51b581838d9c214f338ab4d3669a0bc870c59235b0bae174b9dd0ac7d79
184 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, many of which are part of a link farm and redirect to malicious infrastructure. The ML classifier also flagged this PDF as malicious. The presence of these links suggests an attempt to lure users to malicious sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9171

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=american+and+national+identity+apush+period+1 In PDF document text
    • https://mokekisinuru.weebly.com/uploads/1/3/4/3/134366850/dojiwalul_dirak_kafetolatimim_wasegukozubeb.pdfIn PDF document text
    • https://fidevawane.weebly.com/uploads/1/3/0/8/130814252/6350326.pdfIn PDF document text
    • https://gulemexaw.weebly.com/uploads/1/3/4/3/134360266/1821568.pdfIn PDF document text
    • https://redunexodozik.weebly.com/uploads/1/3/0/8/130814050/valiwadelel.pdfIn PDF document text
    • https://famonusowofem.weebly.com/uploads/1/3/4/3/134349488/dukuxoxusapev-nimejufososube-fejusitenev-bamukizabojofu.pdfIn PDF document text
    • https://laxuruvu.weebly.com/uploads/1/3/1/4/131482832/tidabunaroto-pobitojezos-detobisosujiw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382190/normal_5f8facc2c8f95.pdfIn PDF document text
    • https://kabudededawizo.weebly.com/uploads/1/3/1/3/131383409/6ec94.pdfIn PDF document text
    • https://kusebedanosude.weebly.com/uploads/1/3/1/1/131163667/7580225.pdfIn PDF document text
    • https://nigupisotaku.weebly.com/uploads/1/3/4/3/134374455/5fc96de72036.pdfIn PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/kulezewutabutitew.pdfIn PDF document text
    • https://sutogibigasoju.weebly.com/uploads/1/3/1/0/131070189/1d5c337ddc9c20.pdfIn PDF document text
    • https://lixaworone.weebly.com/uploads/1/3/1/8/131871871/kadijafapesu_donasim_juwam.pdfIn PDF document text
    • https://sonotipudo.weebly.com/uploads/1/3/4/3/134326760/warabamu_rosumomomoj_jusuzup_zuritar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fea7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA7 7260 bytes
SHA-256: fb8a74844dc940836aa205e7f5fce78c2a584cfcf413cf408de1ca29204b55f2
font_01_sfnt_off00011144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11144 5456 bytes
SHA-256: 8627e75055aa90ae72c661c25ab6081395ded9d6f1c42514b5848c0b7aa4f925
font_02_sfnt_off000123ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123AC 63848 bytes
SHA-256: 4be87eda0f10ee5819dfb942214542a083c7aab9097f13507bad5b7878567f57
font_03_sfnt_off0001d02e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D02E 11068 bytes
SHA-256: e2f24fd58ae7f87dda894c987d93fb15afd9ca3566cb5ba56734c4cd576b0526
font_04_sfnt_off0001f60b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F60B 20120 bytes
SHA-256: 0bfaed939ec0cd146a8efd8c2dd4506a31df9de7e9073b73f9971d1ca2666a41
font_05_sfnt_off0002184e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2184E 1748 bytes
SHA-256: fc9aa48e79ccc6e0f914b4748175334026105657c0013aac1cfefd8d71ef0bcc