Malicious PDF — malware analysis report

Static analysis result for SHA-256 1251d30bed1400e1…

MALICIOUS

PDF

71.7 KB Created: 2020-08-29 15:05:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1f7d40439ce0433c9fc7dd3e34cfe53a SHA-1: c06f0d0506fab543d81c25154150ac7f380f6caa SHA-256: 1251d30bed1400e1b2cd510b8bbd278946af6ce4a2c23be6bea25c97f97e0285
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector URL associated with malicious activity. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be a lure for free downloads, leading users to potentially harmful content via the identified redirector.

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.cc/wix?keyword=roguelike+adventures+and+dungeons+se In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_563e00509e5f4d25a3223ff5547c9d4d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_7de014100b8241b9abae2cccd0627259.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_dd07b4a2eac2446b842baa1a30769680.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_f00786febb774dfcb39f79a1bc40f0bc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6638/3768/files/sbi_bank_personal_loan_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3066/4600/files/97112621393.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/9014/4421/files/59277216422.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_7e21ccbca95d4bb39aa29dc03c6e41eb.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_cfc2266b12354d6bb593e96dbaea740c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_235f415b5d794238838a0d95b049f254.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_270e606902264b7b99ef22250449bfd0.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_437b816604f8413ebdc2ca9ed416a3bf.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_72a8694667944921a2d1341581369d6a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_685c5de96c4c4fb7b9e312da8da0a627.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
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009e4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E4C 6744 bytes
SHA-256: 048fb1891f432488516cd811e7b04d68e7d39e548ca3495625137f8fb0c23ff4
font_01_sfnt_off0000af31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF31 5124 bytes
SHA-256: 169cf643fb52e130920325f19290e5e9360570e803b82e8461f89a375f354bc2
font_02_sfnt_off0000c0b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0B1 1728 bytes
SHA-256: 0810ce0371bb48a6dbbb6c56d423a1e4bda4455f4638deeed9c91ec23a796c96
font_03_sfnt_off0000c949.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC949 16272 bytes
SHA-256: 772ff2305db6fb8d9d7135d23a8157c3173d7e0610e3969a90eac1d1aa23ad67
font_04_sfnt_off0000fbf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF3 16064 bytes
SHA-256: 6f41d85279102efce3c4bd26fddb767baf9b68a4f55e239fba9bedc2a2d3b953