Malicious PDF — malware analysis report

Static analysis result for SHA-256 81d624965adadd24…

MALICIOUS

PDF

226.0 KB Created: 2020-08-09 11:57:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 84d73e38429b96c39ac64dec9ae88f22 SHA-1: 5cd867395ae221fdbffc8641bf8171273e8da145 SHA-256: 81d624965adadd244d4107c8c3828af15c10020b66b87e0630ad5d0fba207118
134 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it's a malicious redirector, specifically designed to lure users with a fake download link. The embedded URL `https://ttraff.ru/pify?keyword=mahatma+gandhi+biography+in+english+pdf` is identified as a malicious redirector, likely leading to a phishing or malware distribution site. The document body, though heavily obfuscated, contains the same URL, reinforcing its role in the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 4

  • 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.
  • 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.ru/pify?keyword=mahatma+gandhi+biography+in+english+pdf In PDF document text
    • http://files.caseylynnroland.com/uploads/1/3/2/6/132695401/pilelu-daxurerosagevan-vedujoki-gubumuguw.pdfIn PDF document text
    • http://files.forummanajemen.com/uploads/1/3/0/8/130814284/f0449eec11829.pdfIn PDF document text
    • http://files.bedminsterpto.org/uploads/1/3/1/4/131438151/5b6d37.pdfIn PDF document text
    • http://sedikape.walkpositano.com/uploads/1/3/1/3/131380213/ba079161528636.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.indictrans.orgIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0763/1779/files/puwolitijupor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38140624907.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1541/2632/files/falonoruma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/56150732122.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/alive_pearl_jam_tab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5529/2322/files/54919342152.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0288/8351/files/tuzezixotivukesosuzer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3864/5144/files/kilikelotejorobuja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1311/8872/files/nintendo_switch_soft_reset.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6127/8870/files/merenojofoturewugigov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1456/9640/files/11364938158.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1103/7589/files/86194361352.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9930/6650/files/beijing_subway_map_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0976/7584/files/back_propagation_neural_network_algorithm.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_off00032202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32202 5704 bytes
SHA-256: 24d6447a0516b565a057ba628cb194607761b83c5d6d345f089b7eeac65800e8
font_01_sfnt_off00033548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33548 5236 bytes
SHA-256: f21b05a2340b363a1ed8b0bbfc234bf9da5e90c1c639b98be765a2f280f9ba06
font_02_sfnt_off000345d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x345D5 12224 bytes
SHA-256: ddfce2a990dbd9e6826606ecc34898f665de4d5f1969d0a726b48efa7295426e
font_03_sfnt_off00036d8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36D8B 2688 bytes
SHA-256: 512483c57a24b4352d2eeec5a7eab8e187acc91fc8ae1234fa79abf12fac9a06