Malicious PDF — malware analysis report

Static analysis result for SHA-256 3866f51e6281e0b7…

MALICIOUS

PDF

70.1 KB Created: 2020-09-10 18:43:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4d89ac0d9a8565bd0c311b89c27a5c2b SHA-1: a3f74d4bac51feea1d60c7ba8773d072872e3b94 SHA-256: 3866f51e6281e0b7d6e6f1e2e60af06dc9175f2b7d0a57d61d17297d67659c5b
194 Risk Score

Malware Insights

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

The PDF file contains a mass external link farm, with one prominent link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Rti maharashtra application form pdf' and includes the malicious URL, suggesting a lure for phishing or malware delivery. The presence of numerous links to external PDFs hosted on domains like static.usrfiles.com and other suspicious domains further supports the malicious intent.

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.club/wix?keyword=rti+maharashtra+application+form+pdf In PDF document text
    • http://files.amazingdownunder.com/uploads/1/3/2/7/132712206/bezulozobufij.pdfIn PDF document text
    • http://kikid.hia460eportfoliolizwilson.com/uploads/1/3/2/7/132710712/5531273.pdfIn PDF document text
    • http://gonez.fibrosisinstitute.com/uploads/1/3/2/6/132681579/5340624.pdfIn PDF document text
    • http://files.theinsurancecorners.com/uploads/1/3/2/6/132696113/pijubugew-konow-maruwizanewiru.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://static.usrfiles.com/ugd/2b98a3_3089cb6a66954823a51db1d037cde945.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/590778_1352dff7904c4fa7812a907ff264e141.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/26938b_e0ef6dbff0c149faa1fdd8db910a80e4.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/800b88_0475b1dce7554244b6a0a860cf9714a6.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/1fbf8b_f80d76cdb7804b52ae6b76cf965977a7.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_d746cacea8cd4c9a86ccd86b9cf76171.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a421e3_88703ddff3aa4af88e84b3ce115c41ce.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/1cc777_b022409fd7d0472db94935b8a46f143a.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6213/1869/files/gaxakodulawekalelinoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8534/0580/files/37197942847.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4883/6004/files/dajizonikevake.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ab3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB3C 5072 bytes
SHA-256: 20925f999dcddf7f545d1d48749f9c82c747a9b4165c0a362821757f13a78680
font_01_sfnt_off0000bc40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC40 14860 bytes
SHA-256: 14ae5ac24d4cac83a3d12ffc13c18f03bad28bee30402303a9abddcb5766bd98
font_02_sfnt_off0000e9e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E5 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
font_03_sfnt_off0000f7e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E4 5176 bytes
SHA-256: e3a1ff62a46c446b0d13b305e905ddcc346d952ea8262dd0f7bad9658d49a467