Malicious PDF — malware analysis report

Static analysis result for SHA-256 6702e3a880e62425…

MALICIOUS

PDF

49.9 KB Created: 2020-10-27 15:13:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 2d49508d8d94bd2963095cffa4a90d34 SHA-1: ddde510486b27ae93556dacc1e0933f358674afa SHA-256: 6702e3a880e624252fbd4bef02a8636d97531c293abbf5bab421d20d3fbe7d61
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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.
  • 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.link/123?keyword=imperial+cooking+bdo+xbox In PDF document text
    • https://cdn-cms.f-static.net/uploads/4389127/normal_5f90786e278b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403413/normal_5f976260b654e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366008/normal_5f86f57ba1fe2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367313/normal_5f87b64668212.pdfIn PDF document text
    • https://jorimedazaget.weebly.com/uploads/1/3/0/7/130738946/gazosod.pdfIn PDF document text
    • https://bimidupixujeg.weebly.com/uploads/1/3/4/3/134319160/2541299.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382789/normal_5f97fcbb4abd2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366637/normal_5f89d106048ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380405/normal_5f8e28e9e9bdd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381291/normal_5f8b263f69104.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368229/normal_5f8faf308671d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369656/normal_5f8961c7b90a8.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/1/0433/8856/7706/files/risimudiboko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6259/8067/files/ore_forming_minerals.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3508/5978/files/circle.io_game_unblocked.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9386/1553/files/fraction_worksheets_addition_subtraction_multiplication_division.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7783/1329/files/pathfinder_vital_strike_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6899/2935/files/kogan_55_4k_led_tv_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8545/8327/files/36144465560.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/2463/6823/files/eve_online_minmatar_epic_arc_guide.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_off0000766c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x766C 5132 bytes
SHA-256: 5131bb11231cf87951eae37593af1b50311a583be361f226e99f31996d12c7de
font_01_sfnt_off000087af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87AF 11068 bytes
SHA-256: 7dd7609d5051fe0be08e85cfb6ec566aa0e1e84f093509d7de02968fd699a741
font_02_sfnt_off0000ac8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC8E 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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