Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8e763b795fed2df…

MALICIOUS

PDF

72.6 KB Created: 2020-11-02 20:51:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 1b2258348d5c0c330a34bef7cc166ff8 SHA-1: 4793af9d5e9ec103ced4b06260eebb2d33728a97 SHA-256: c8e763b795fed2dfe2a7cd72991864e16d600e6f0c75a84c22c94b229381e484
154 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a redirector URL, which is a common tactic for phishing or malware distribution. The ML classifier strongly indicated maliciousness, and the presence of a link farm suggests an attempt to manipulate search engine results or distribute content broadly. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent.

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=nature+by+henry+wadsworth+longfellow+analysis In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369784/normal_5f8beb086e52e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370053/normal_5f8e0b3e82dcc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375509/normal_5f9736f9e782b.pdfIn PDF document text
    • https://walijogopabo.weebly.com/uploads/1/3/0/7/130776167/jesozitufas_bareradikakap_zopan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420608/normal_5f9a7225460d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376625/normal_5f8aff7b734ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412887/normal_5f9988605f8a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374199/normal_5f9d13fccf6e0.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/1/0497/9382/6978/files/the_sniper_short_story.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0a7e717-b6d2-4f7a-ae6a-b4b15bd60fa3/80461121467.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3343/5029/files/wapking_free_bollywood_song_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/2778/0531/files/oxnard_police_department_oxnard_ca.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4959/4263/files/zunululikegilarife.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8493/1758/files/tejetez.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFFF 5472 bytes
SHA-256: 8d0675d9305d297ff414e17d307b642370b6e5b02a636578038972a651bbaba0
font_01_sfnt_off0000f2b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B1 10416 bytes
SHA-256: b6e29e2d016370b27ff25ae73d30a97372ac9d38c1b22afbeaec92015efb6ae0

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