Malicious PDF — malware analysis report

Static analysis result for SHA-256 827addd6b8e36317…

MALICIOUS

PDF

64.9 KB Created: 2020-08-19 07:39:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e609c84dcf93cabceef95853ff118b8d SHA-1: 4b4585c9f4416bcdf61bcb25095ac6978ed086e0 SHA-256: 827addd6b8e36317384c13b620567d30be6ee5e524b0f052ec18074f8bb2fde7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing indicating a malicious redirector link to 'ttraff.com'. Additionally, it exhibits characteristics of a link farm, with numerous external links, many pointing to Shopify domains. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector appears to be directing users to malicious infrastructure via embedded links.

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=backend+template+free
    • http://files.simplypilatesandstretch.co.uk/uploads/1/3/1/3/131380107/fa445487f967.pdf
    • http://zuxuz.impactcommunications.org/uploads/1/3/1/0/131069934/xasituboregupak-puxiwa-fogudejiretad-begatuxomiz.pdf
    • https://cdn.shopify.com/s/files/1/0434/7353/5138/files/32528535886.pdf
    • https://cdn.shopify.com/s/files/1/0454/7182/6072/files/lelow.pdf
    • https://cdn.shopify.com/s/files/1/0434/1710/8642/files/mixozixukotubazaves.pdf
    • https://cdn.shopify.com/s/files/1/0431/7829/5450/files/91658608062.pdf
    • https://cdn.shopify.com/s/files/1/0433/8289/8840/files/2989445266.pdf
    • https://cdn.shopify.com/s/files/1/0434/1900/9173/files/bach_fugue_in_c_major_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0428/8679/1334/files/uss_nimitz_arma_3.pdf
    • https://cdn.shopify.com/s/files/1/0431/3684/3933/files/49065215596.pdf
    • https://cdn.shopify.com/s/files/1/0445/7873/4239/files/dowogalafidud.pdf
    • https://cdn.shopify.com/s/files/1/0437/7106/8577/files/11639687049.pdf
    • https://cdn.shopify.com/s/files/1/0432/7433/8454/files/fujamoni.pdf
    • https://cdn.shopify.com/s/files/1/0437/2014/7095/files/aufenthaltstitel_beantragen.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/

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008d48.bin
29c2cead8ba3fb78aa01733679b78024f19415bb28851fb0629f1b35da86373b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D48 4864 bytes
font_01_sfnt_off00009dab.bin
ef360a5dbd1f3d5d073c416e40c4457ca3b1e54e5134705a3ed7ef28fc5be3aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DAB 4272 bytes
font_02_sfnt_off0000ae8c.bin
4a0e3f5aef385171a50e8fa0469af11949ff18e8eb0975b64b52af142be7dfb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE8C 10156 bytes
font_03_sfnt_off0000d188.bin
c470a912f17a33d24ae80674671626163d7d2787c6fa71bc4267a1d5f8d55d1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD188 16652 bytes
font_04_sfnt_off0000e796.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE796 4324 bytes

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