Malicious PDF — malware analysis report

Static analysis result for SHA-256 87523b73d9404385…

MALICIOUS

PDF

49.3 KB Created: 2020-08-21 03:19:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 717f864c82adc880df9dde081fb7de2e SHA-1: 793ece0d06ac18b7ea08e07d462e22803b213518 SHA-256: 87523b73d9404385d0e1b22a2754111e1e8594eced1a5f60af2d1c1f4377c32f
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the same URL, suggesting a social engineering lure. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, further supporting a malicious intent to redirect users.

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/pify?keyword=annual+report+of+coca+cola+pakistan
    • http://dosagijik.truehopehealthyliving.com/uploads/1/3/1/6/131606875/gagasixuzan.pdf
    • http://farilikim.katetobin.com/uploads/1/3/1/0/131071164/8867709.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/5959/3894/files/32829141224.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tokon.pdf
    • https://cdn.shopify.com/s/files/1/0431/3812/1895/files/colony_america_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0434/1334/0312/files/bodobax.pdf
    • https://cdn.shopify.com/s/files/1/0435/2281/8212/files/75358366094.pdf
    • https://cdn.shopify.com/s/files/1/0437/3138/6529/files/dezotoxubirake.pdf
    • https://cdn.shopify.com/s/files/1/0440/5490/4997/files/99323076646.pdf
    • https://cdn.shopify.com/s/files/1/0435/9005/8152/files/sotifewibatibiwisanipumu.pdf
    • https://cdn.shopify.com/s/files/1/0435/5863/3631/files/bulk_sms_app_for_android_mobile.pdf
    • https://cdn.shopify.com/s/files/1/0437/5724/0478/files/boating_license_canada_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/1359/4526/files/etica_a_nicomaco_aristoteles_os_pensadores.pdf
    • https://cdn.shopify.com/s/files/1/0434/7353/5142/files/21620334802.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068c4.bin
11c973c8e9dd1fffcebb453af6d9d6105001cc775f674bf68c44975b02c57ed8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68C4 5064 bytes
font_01_sfnt_off00007a07.bin
96f33b13a885fcf0f70528a21954f2fc6ba93d3dee054c62f0a82fc9071da824		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A07 10444 bytes
font_02_sfnt_off00009df4.bin
4372c28bd26e3ab2b4a6277039521bd467e7fed0117080ae1d286279f8a80a0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DF4 17572 bytes

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