Malicious PDF — malware analysis report

Static analysis result for SHA-256 13eeace1d49b5411…

MALICIOUS

PDF

56.0 KB Created: 2020-10-23 13:32:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 958c0ae63edfea57970359fbf2c3ca23 SHA-1: 87ce1d1b9541549aa56796b00471d5e2b774a65d SHA-256: 13eeace1d49b5411bc64fe5ce72dd14a14099f8a07d0efeaf87c510e8b9d986d
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link that is disguised as a user manual. This link points to 'https://ttraff.link/123?keyword=saeco+aulika+top+user+manual', which is a known malicious domain. The document also contains a large number of external PDF links, many of which are hosted on Shopify, suggesting a link farm or SEO manipulation tactic to distribute malicious content.

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=saeco+aulika+top+user+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6790/0061/files/fazitaja.pdf
    • https://cdn.shopify.com/s/files/1/0501/6852/9058/files/baby_luigi_crying.pdf
    • https://cdn.shopify.com/s/files/1/0500/2140/0745/files/13971756228.pdf
    • https://cdn.shopify.com/s/files/1/0478/9773/9430/files/degomexedotifinetiwatu.pdf
    • https://cdn.shopify.com/s/files/1/0502/8190/6370/files/cisne_negro_libro.pdf
    • https://uploads.strikinglycdn.com/files/84e2280f-27b6-4f61-838a-d03c255dad93/dopubeba.pdf
    • https://uploads.strikinglycdn.com/files/61a39334-a5db-43bc-b829-e723c77a5651/22280090882.pdf
    • https://uploads.strikinglycdn.com/files/3bb2d1bc-ef0a-4088-9e92-f5f19ffadfca/tugewemobasoxola.pdf
    • https://cdn.shopify.com/s/files/1/0501/6499/0117/files/loomis_auto_body.pdf
    • https://cdn.shopify.com/s/files/1/0486/0752/7077/files/55195198033.pdf
    • https://cdn.shopify.com/s/files/1/0430/8389/0850/files/how_to_rotate_a_table_in_word_2019.pdf
    • https://cdn.shopify.com/s/files/1/0500/4155/3046/files/contoh_proposal_penelitian_kualitatif_lengkap.pdf
    • https://cdn.shopify.com/s/files/1/0434/5623/3638/files/44135459603.pdf
    • https://cdn.shopify.com/s/files/1/0266/8462/0991/files/votexuxasakodite.pdf
    • https://cdn.shopify.com/s/files/1/0483/3735/4903/files/office_of_capital_and_forensic_writs_salary.pdf
    • https://cdn.shopify.com/s/files/1/0439/4093/7896/files/departamento_de_la_familia_telefono_bayamon.pdf
    • https://cdn.shopify.com/s/files/1/0500/1392/9630/files/tobisokug.pdf
    • https://uploads.strikinglycdn.com/files/27c78320-24ce-4898-bca9-4c0fd72da826/5334846242.pdf
    • https://uploads.strikinglycdn.com/files/3aa4f73d-72a7-4785-aa76-10cc0156c1d6/john_deere_serial_numbers.pdf
    • https://cdn.shopify.com/s/files/1/0266/7836/2310/files/xefufivoge.pdf
    • https://cdn.shopify.com/s/files/1/0439/4916/2654/files/ankylosing_spondylitis_treatment_nice_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0496/1727/2996/files/64536172361.pdf
    • https://cdn.shopify.com/s/files/1/0499/2191/7086/files/taluladasolesokud.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000b3ce.bin
505b5caac287533fb2d435f2408f51ec8dd12b7917409788bcf0e79add29fb29		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xB3CE 19140 bytes
font_00_sfnt_off00007e80.bin
2e257b7175abd027d590ec8844abb10fe857e255536b5a6b095121efe6202252		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E80 5248 bytes
font_01_sfnt_off00009036.bin
d7bac96211eca11822fd9b30cc8164d1d0d49417bebb7cb69a2153b2b8715739		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9036 10320 bytes

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