Malicious PDF — malware analysis report

Static analysis result for SHA-256 7716a95bda4c5f9e…

MALICIOUS

PDF

43.7 KB Created: 2020-10-26 22:59:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 74820b7b1ba2f387679c0d075e0bb7ec SHA-1: 1fbac83f187ac74d9caeea9393850e0ec6f327e2 SHA-256: 7716a95bda4c5f9ef613d341dd7b3a03b39e49a60de1851fe5c98d85ce19f192
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to S3 buckets and Shopify domains, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to a known malicious redirector, `https://ttraff.club/pify?keyword=wifi+extender+walmart+price`, which is likely the primary malicious payload delivery mechanism. The ML classifier strongly supports the malicious nature of this PDF.

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.club/pify?keyword=wifi+extender+walmart+price In PDF document text
    • https://fitakizegeva.weebly.com/uploads/1/3/3/9/133999514/beporasetaw.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/likanutavorolebonat.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/sijuwoxujupid.pdfIn PDF document text
    • https://segakimorepej.weebly.com/uploads/1/3/0/7/130738797/4403193.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/belapigojat.pdfIn PDF document text
    • https://putigazabikikim.weebly.com/uploads/1/3/2/6/132682718/piruxubowizogoxex.pdfIn PDF document text
    • https://nitetezelimon.weebly.com/uploads/1/3/1/4/131438651/ad9023.pdfIn PDF document text
    • https://jepirozo.weebly.com/uploads/1/3/4/4/134474462/6572115.pdfIn PDF document text
    • https://rapokivagifo.weebly.com/uploads/1/3/4/3/134338569/1547599.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/mijukimitukobilagu.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/91735996776.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/fexobomumodaj.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/96015547456.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/1861/5449/files/mathematics_counts_cockcroft_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/2245/7242/files/lennox_model_51m33_thermostat_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0159/3502/files/dr.fone_toolkit_for_android_review.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4977/0395/files/where_is_area_code_978-304.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/36068654281.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/neural_conduction_and_synaptic_transmission.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/netizens_in_cyberspace_active_citizenship.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/present_simple_vs_present_continuous_exercises_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/69379394886.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/86266296630.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/5th_grade_math_problems_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/84357195246.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/cechy_charakteru_po_angielsku.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_off00006a39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A39 5296 bytes
SHA-256: 30f95ea3cf732e4b51dd81a727aed5ef880890752f8f362bb1b39cf6b0f2e09f
font_01_sfnt_off00007c3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C3C 10948 bytes
SHA-256: b5a026b5062cb6efd7046999dff76038e70978d8fac27c04400c6070c58b3edf

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