Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a4da35a3d7cfe3f…

MALICIOUS

PDF

46.2 KB Created: 2020-10-26 15:45:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 2b4ea7cdaff6951a62c11bb24e59710f SHA-1: 8dd80bbbd6c5df68432f4253ff0a9ce12acf2c4c SHA-256: 3a4da35a3d7cfe3fa4e229fe8fff13d2d36371676ff5a27ce671f5c01b3048c4
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm for SEO manipulation or to obscure malicious redirects. One critical heuristic identified a link to known malicious redirector infrastructure at `https://ttraff.cc/123?keyword=extreme+football+mod+apk+download`. The document body, though heavily obfuscated, contains references to 'extreme football mod apk download' and the malicious URL, indicating a lure to trick users into clicking the link. No scripts were extracted, but the presence of numerous links and the malicious redirector strongly suggest a phishing or malware distribution attempt.

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.cc/123?keyword=extreme+football+mod+apk+download In PDF document text
    • https://zekasujiminog.weebly.com/uploads/1/3/4/3/134366003/10066702240f.pdfIn PDF document text
    • https://wosezobar.weebly.com/uploads/1/3/1/8/131856012/bfe8426fb8ea8.pdfIn PDF document text
    • https://fozokixudaxo.weebly.com/uploads/1/3/4/3/134355354/8255969.pdfIn PDF document text
    • https://xebivonejawaf.weebly.com/uploads/1/3/4/0/134096192/4650198.pdfIn PDF document text
    • https://ziridizozavixik.weebly.com/uploads/1/3/4/4/134400570/5036085.pdfIn PDF document text
    • https://jamitugila.weebly.com/uploads/1/3/4/0/134012499/775cc2c1a5c9f.pdfIn PDF document text
    • https://bevugatumuga.weebly.com/uploads/1/3/4/3/134316863/8062842.pdfIn PDF document text
    • https://bizumoku.weebly.com/uploads/1/3/2/6/132681494/6854454.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/1/0428/8482/5247/files/ganakofujowofarazetemuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7715/2151/files/modern_combat_5_blackout_mod_apk_offline.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/0504/5668/files/spirit_twelve_dreams_of_dr_sardonicus_vinyl.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/5317/8791/files/hcf_and_lcm_worksheets_for_grade_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56cf2602-b660-44c7-bfa3-4c9bb4d11e6b/wavozanudoxalibesi.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/hdfc_life_sanchay.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/jodeteg.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/91435579692.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/maintain_automatic_teller_machine_atm_services.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/carbohydrates_definition_classification_structure_and_properties.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/48801661585.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/bong_appetit_cookbook.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_off00007637.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7637 5328 bytes
SHA-256: c51c30134d2da87246033f57d634384fbc1089e6677a8ef8a1fdea2ec4259e69
font_01_sfnt_off00008851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8851 10336 bytes
SHA-256: 257fa31964c74dd35a4152a61e543d1ca05730bbad5f8d14b9063397c0a9a222

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