Malicious PDF — malware analysis report

Static analysis result for SHA-256 a21cac369f5a86e8…

MALICIOUS

PDF

59.0 KB Created: 2020-08-19 09:03:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 87e2a1b9ad5e92df6b506e1064588e26 SHA-1: 85913151c2c86dd0dcfb0176ea5bf2ffabb691d0 SHA-256: a21cac369f5a86e811e049ba73787e138509f489c3d16e8a674288b6c1c419d7
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One critical heuristic firing indicates a link to a known malicious redirector at ttraff.com. The document body, though heavily obfuscated, contains the same malicious URL, suggesting the primary intent is to redirect the user to malicious infrastructure.

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.com/pify?keyword=bubble+bobble+memories+apk In PDF document text
    • http://files.the-green-school.org/uploads/1/3/2/7/132712373/2755378.pdfIn PDF document text
    • http://files.kbassormt.ca/uploads/1/3/1/3/131381480/madosaside.pdfIn PDF document text
    • http://files.hicsa.org/uploads/1/3/1/0/131071072/xogutefu-nesovevevini-kadelize-wijopoj.pdfIn PDF document text
    • http://files.ballroom-blitz.com/uploads/1/3/1/4/131452867/luvefaxubog.pdfIn PDF document text
    • http://files.shunsart.com/uploads/1/3/0/7/130775921/ab0820e8bec20.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7388/8671/files/viragumibowegerom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/1344/7336/files/tawuwovaleruwalavifatefik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73470001672.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6890/0006/files/bemuwuruwezazox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9815/8744/files/846466214.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7922/1927/files/mobutotuvunojedajifun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5063/0296/files/wotosewatojifututebu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5593/0783/files/7664683219.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2998/5430/files/gijobutimuzefozudotara.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6961/2966/files/gurren_lagann_episode_6_uncut.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006853.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6853 4912 bytes
SHA-256: 83fc83a3b7a5ecb3d0c0d7234f66daa8cc2a2a0a95478dd68c0577bfe4cac381
font_01_sfnt_off000078f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78F8 8536 bytes
SHA-256: 5c0e874dd76beffd31bd4868d82f491b3cadead12aea739412578b7d5b5e4a15
font_02_sfnt_off00008ff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FF2 15252 bytes
SHA-256: db501b10b00b8086b381105629b83a2bc1b36d712182d9fd86f648fe49cf1748
font_03_sfnt_off0000bf2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF2A 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
font_04_sfnt_off0000cd2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD2B 4596 bytes
SHA-256: 2771d55b51ff65a7fb5333b85693b8a431ccd293351b0d422a219fa066fe951b