Malicious PDF — malware analysis report

Static analysis result for SHA-256 91de64b3cc57c533…

MALICIOUS

PDF

34.2 KB Created: 2020-08-09 05:39:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c17ac14c189b81e5d993099927af349 SHA-1: 6d343c229411eb96146fdbaec9ed95e0ae888856 SHA-256: 91de64b3cc57c53329831de78b1ac28d7ef6782d419e6d057be0139ef0060c05
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.ru/pify?keyword=download+concise+oxford+dictionary+of+english+etymology+pdf`. This indicates the document is designed to redirect users to malicious sites. Additionally, a PDF link farm heuristic was triggered, suggesting a large number of outbound links, many of which are hosted on Shopify. The document body, though heavily corrupted, contains the same malicious URL, reinforcing the intent to lure users to external, potentially harmful, content.

Heuristics 3

  • 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.
  • 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.ru/pify?keyword=download+concise+oxford+dictionary+of+english+etymology+pdf
    • http://duwiva.reclaimedlumberus.com/uploads/1/3/0/8/130813528/xevojoro-ginin.pdf
    • http://files.gallantacademy.com/uploads/1/3/1/4/131438330/981531.pdf
    • http://files.prakrutischool.in/uploads/1/3/1/6/131606335/1186912.pdf
    • https://cdn.shopify.com/s/files/1/0432/3731/0626/files/napinekojabi.pdf
    • https://cdn.shopify.com/s/files/1/0429/2021/4681/files/dikukijagoje.pdf
    • https://cdn.shopify.com/s/files/1/0438/4607/4525/files/bunituramoxanisupus.pdf
    • https://cdn.shopify.com/s/files/1/0427/6004/4710/files/nifunogutowametozo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3860/4450/files/32770514920.pdf
    • https://cdn.shopify.com/s/files/1/0429/5114/7679/files/vazesepekujibebot.pdf
    • https://cdn.shopify.com/s/files/1/0430/7563/3306/files/xinogira.pdf
    • https://cdn.shopify.com/s/files/1/0434/6239/4021/files/mukigi.pdf
    • https://cdn.shopify.com/s/files/1/0439/8841/8718/files/rewrite_the_stars_piano_sheet_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/9984/0921/files/9348589504.pdf
    • https://cdn.shopify.com/s/files/1/0428/6083/9078/files/rewrite_the_stars_chords_piano.pdf
    • https://cdn.shopify.com/s/files/1/0431/0886/0065/files/automata_theory_and_computability_by_padma_reddy.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004730.bin
65c6e69689f1e81b861126e28b64832c3074dc9b1b5d5287b9ad4bef20020e0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4730 5832 bytes
font_01_sfnt_off00005b07.bin
7db151647b4bda38f6470d6550de946d6dcea32e23c4e28809c3552bc606b276		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B07 9528 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.