Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d1a0897ab7b263a…

MALICIOUS

PDF

66.5 KB Created: 2020-08-23 12:44:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5c6ad101bad1ebba7997d8cd8a96174 SHA-1: 576753cd9740982c9c8a9a0420f291c7112890ba SHA-256: 6d1a0897ab7b263aad58a656ffad4fa376fc6888c3c8c70bd4eecebcffc3cde9
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is ttraff.com, which is used in conjunction with a keyword suggesting a lure related to Android development libraries. While no scripts were explicitly extracted, the PDF structure and link farm behavior suggest an attempt to lure users to malicious content, potentially for phishing or malware distribution.

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.com/pify?keyword=androidx+support+library+%25E5%2585%25B1%25E5%25AD%2598
    • http://files.mariapapapostolou.com/uploads/1/3/1/1/131164100/dufuwudibaz.pdf
    • http://ribasa.edmtool.com/uploads/1/3/1/4/131407222/bokepe.pdf
    • http://jebav.mydiggersden.com/uploads/1/3/1/4/131453541/1446561.pdf
    • http://kaguwis.store.easy-editor.com/uploads/1/3/1/6/131606666/ganuzu_sajiguxomuxif_pumulujofi.pdf
    • http://files.deniseestewart.com/uploads/1/3/1/4/131454620/xotubuti_loderefepurunut_bovufolugegek.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/6965/1606/files/assistive_touch_android_2019.pdf
    • https://cdn.shopify.com/s/files/1/0428/8249/8716/files/67336297338.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/cover_letter_format_for_job_application_for_freshers.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bifezunelavezide.pdf
    • https://cdn.shopify.com/s/files/1/0431/3025/7568/files/amadeus_software_training.pdf
    • https://cdn.shopify.com/s/files/1/0434/5469/3529/files/affiliate_business_model.pdf
    • https://cdn.shopify.com/s/files/1/0434/9339/2536/files/72989934962.pdf
    • https://cdn.shopify.com/s/files/1/0430/2589/1479/files/xudajunugodolezelojexu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5180/9957/files/lawobokabiw.pdf
    • https://cdn.shopify.com/s/files/1/0440/6001/6790/files/logitech_control_center.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008984.bin
c9b4ff7d6433076cc1c2644d0c4faa3ea2ab51d1a75432a2eddcdb0d91e343a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8984 11056 bytes
font_01_sfnt_off0000ad64.bin
b387182b2e0060efc1f65695a97d3bcf763230e8e99cc32568ac4461013648ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD64 3272 bytes
font_02_sfnt_off0000b901.bin
148d09786b48eb479494a46012f4364ccd5a00c9bb3dfa235531db3ac892bd14		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB901 5252 bytes
font_03_sfnt_off0000caeb.bin
dad225a6fe5cf806e210c590b7aae86a96035df6e6f54b35108ec71e8f7db2a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCAEB 15040 bytes

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