Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca73eec4fda89794…

MALICIOUS

PDF

38.6 KB Created: 2020-08-21 14:10:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 49f9393ca72363b3bd4b096ef594de86 SHA-1: 31e7c3bb0976c5e841efcbf562d86ee1025cb69d SHA-256: ca73eec4fda897948b243701845af1e042dd105d49cf5969484e97d7feca79e0
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, pointing to 'https://ttraff.cc/pify?keyword=font+blippo+light+sf'. This indicates the document's primary purpose is to lure the user to a malicious site. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify. While the document body is heavily obfuscated, the presence of the malicious redirector URL is the strongest indicator of 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.cc/pify?keyword=font+blippo+light+sf In PDF document text
    • http://files.second-childhood.com/uploads/1/3/1/3/131380440/61b271f995.pdfIn PDF document text
    • http://files.stonecirclepress.com/uploads/1/3/1/6/131606537/5315b29bf2c586.pdfIn PDF document text
    • http://files.7seaswriting.com/uploads/1/3/1/4/131453208/fibopi-fonoveke-pibusaropu.pdfIn PDF document text
    • http://files.agapa.net/uploads/1/3/1/8/131858592/8895606.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
    • https://cdn.shopify.com/s/files/1/0432/7620/6240/files/44268182077.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7963/1012/files/11518242904.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7088/1946/files/15446564104.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7087/1970/files/achievement_test_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2825/0781/files/96139354945.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/linking_verbs_and_helping_verbs_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/37604868145.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1512/7708/files/29843823932.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/61051106257.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3673/5650/files/big_data_analytics_iot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/hallelujah_viola_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1829/6232/files/86336692432.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7850/7934/files/13108022744.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2506/2298/files/dokovubekikapalumuxure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9414/6200/files/1679462005.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D6A 4624 bytes
SHA-256: bf6c4f58980b3e250b2bcdb5a89e3e1f5dcad54a8f30cf5df50e507687c56624
font_01_sfnt_off00005d19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D19 10028 bytes
SHA-256: 3e79a7b965387408c3ee05617f76a580337983301bb94cbe7a0c96c2cedfb3c0
font_02_sfnt_off00007f65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F65 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333