Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfee4a76123dec4e…

MALICIOUS

PDF

55.0 KB Created: 2020-08-24 00:47:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6975f599fc81aec174f71d192870b2c4 SHA-1: ae34023585e75eb85cda1cba210a0cefd0645c25 SHA-256: bfee4a76123dec4e0777bec13402db4fd7ba331ebd1097a9e875a242f117d767
194 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=holla+video+chat+app+apk'. This indicates an attempt to lure users to malicious infrastructure, likely for phishing or malware distribution. The document body, though heavily obfuscated, also contains this URL and other links, reinforcing the social engineering aspect. The presence of a PDF link farm heuristic further suggests a mechanism for distributing malicious content or SEO poisoning.

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/pify?keyword=holla+video+chat+app+apk In PDF document text
    • http://giginune.domaszeromskasmusic.com/uploads/1/3/0/8/130814017/zugoku_sutosaso.pdfIn PDF document text
    • http://files.owsleytilecleaning.com/uploads/1/3/1/4/131453998/gujitodobo.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/1/0450/5577/0776/files/newspaper_activities_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fakuwonilojovaxibudebu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2956/0481/files/vavolirezopa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/14981909947.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7646/0448/files/89222494477.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32823332632.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/6676/0856/files/riddle_answers_and_questions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7194/7423/files/muxanefopuredidefiroje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8235/7663/files/kenmore_50_pint_dehumidifier.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/dukozizerofa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7058/7029/files/nivobudasubamexunuke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5627/4339/files/91503970395.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000ab9e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xAB9E 21040 bytes
SHA-256: 564fc7591070c1516d5bfffce99cfaeada403de4e0272a20f3eb6ff6a2a43624
font_00_sfnt_off00004fef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FEF 4972 bytes
SHA-256: c3cbcd9a3cf66a5949f1240fb85d761ffc7f3e3d0d4beb6f5e2194a834a8e263
font_01_sfnt_off000060d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60D3 12988 bytes
SHA-256: cd80f1c9f1466931c96618f88261192a75bc2044ae8e80b55509abcdc7614789
font_02_sfnt_off00008816.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8816 10380 bytes
SHA-256: d3342bf454dad5166307edaa692b46f2f2389b7de129880f02f8fef3cf24a114