Malicious PDF — malware analysis report

Static analysis result for SHA-256 18127af53f65cfcd…

MALICIOUS

PDF

47.6 KB Created: 2020-07-27 21:10:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9267db16b2196dc696ddb7d2a55353a9 SHA-1: a375fe7507eb91e64f3ccb747291dc723f5476f9 SHA-256: 18127af53f65cfcd608baef3a70733458e32a2d0dd0c5051e2608ea9af093f6a
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external PDF files, a technique often used for SEO poisoning or to host phishing content. One of the embedded URLs, 'https://ttraff.cc/pify?keyword=amapiano+songs+list', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the overall structure and linked content suggest a malicious intent to redirect users to harmful sites.

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=amapiano+songs+list
    • http://files.quantumarabians.com/uploads/1/3/1/3/131381772/1514889.pdf
    • http://files.campverdecommunitychurch.org/uploads/1/3/2/7/132741764/xagiwase-nuwas-gilar-pitupap.pdf
    • http://files.longviewforest.com/uploads/1/3/2/6/132681026/f5d1bcb7d0cd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/4887/6702/files/gufiradujupalamud.pdf
    • https://cdn.shopify.com/s/files/1/0435/1967/2472/files/36089568523.pdf
    • https://cdn.shopify.com/s/files/1/0431/0004/5469/files/momimeraburuw.pdf
    • https://cdn.shopify.com/s/files/1/0434/3191/9765/files/56139507731.pdf
    • https://cdn.shopify.com/s/files/1/0430/8893/7120/files/vufujegufakuruxusegabelan.pdf
    • https://cdn.shopify.com/s/files/1/0433/8424/2337/files/wagasiga.pdf
    • https://cdn.shopify.com/s/files/1/0431/0876/1751/files/xarurovunukadedidufebase.pdf
    • https://cdn.shopify.com/s/files/1/0434/7248/6564/files/ratexabotazetavularab.pdf
    • https://cdn.shopify.com/s/files/1/0429/5409/6806/files/pepofunezekagifugepufo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9941/3925/files/55685383693.pdf
    • https://cdn.shopify.com/s/files/1/0432/3488/5792/files/vebenew.pdf
    • https://cdn.shopify.com/s/files/1/0430/4030/9402/files/firunefo.pdf
    • https://cdn.shopify.com/s/files/1/0433/1739/5614/files/belatogu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007c29.bin
4f105f9906bdc1cadb3129fc5951fd56c8c3ff0d93be5b8e0603b9f4979db11d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C29 4700 bytes
font_01_sfnt_off00008bfa.bin
64c878bc03d8813cfdf797027a24b6db48f7ae778ea661430f7d322411027b91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BFA 10864 bytes

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