Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a59f62fc2849d8b…

MALICIOUS

PDF

110.3 KB Created: 2020-09-16 19:16:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 14a1b8ae18e49083189592b008041b2d SHA-1: 48199e68ffaede576fc2febcce5ba0f5ed37e5c4 SHA-256: 5a59f62fc2849d8b30ad1d23b10d6ca1b5f08d9f4c4fed4c0e3e9169df97ed83
194 Risk Score

Malware Insights

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

The PDF contains a heuristic match for an advance-fee scam lure, indicating a fraudulent intent. It also contains a link to a known malicious redirector, which is likely used to deliver a secondary payload or lead the user to a phishing site. The document body, though heavily obfuscated, contains the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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/wb?keyword=jiren%20ultra%20instinct
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7210/2308/files/tuvixatafofedawewu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9540/0356/files/declaration_of_independence_worksheet_11th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0430/3034/7938/files/gutixunepufejufibizex.pdf
    • https://cdn.shopify.com/s/files/1/0435/1908/2651/files/xasimoderik.pdf
    • https://cdn.shopify.com/s/files/1/0429/0409/2828/files/18361694180.pdf
    • https://cdn.shopify.com/s/files/1/0431/0879/4530/files/77259503940.pdf
    • https://cdn.shopify.com/s/files/1/0434/1055/5034/files/zesufubas.pdf
    • https://cdn.shopify.com/s/files/1/0430/9952/1181/files/kmspico_windows_7_ultimate_64_bit_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/6980/8550/files/81431929714.pdf
    • https://cdn.shopify.com/s/files/1/0431/8507/8423/files/96410901498.pdf
    • https://cdn.shopify.com/s/files/1/0447/9189/0071/files/rest_api_performance_testing_tools_open_source.pdf
    • https://cdn.shopify.com/s/files/1/0437/3089/4999/files/anesthesia_journal.pdf
    • https://cdn.shopify.com/s/files/1/0437/0078/1208/files/interview_questions_for_customer_service_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0462/2696/4631/files/tanis_half-_elven.pdf
    • https://cdn.shopify.com/s/files/1/0431/2095/1445/files/xopogopebu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016bd2.bin
1b71b5d6fae8ed8eb997f83c4c82dcc1e5a4d864266ecfc2c514f056cf76e08e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16BD2 3692 bytes
font_01_sfnt_off00017907.bin
eca1cd17967221e0cc24edc125b1286aaecc5100dac55707d65b204a2ead0ccf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17907 4780 bytes
font_02_sfnt_off00018955.bin
138b6e7a2ee13a6496e7507eabbb8e9fe03ce4c41dfbf7bab1dda8bdd7308bd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18955 10320 bytes

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