Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2b046553a42c778…

MALICIOUS

PDF

41.4 KB Created: 2020-08-11 14:32:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c5d10182b6aba15dbc9592e297b2d2d SHA-1: 36b2b9f5f10014470798fce0105067e573f1e26d SHA-256: f2b046553a42c778395a49483610fce977fa8e36c58e22503b9cf450f2627c58
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file contains a link farm designed to redirect users to malicious infrastructure. The primary redirector URL is ttraff.ru, which is flagged as malicious. The document body, though heavily obfuscated, contains the text 'Adding integers worksheet pdf' and the malicious URL, suggesting a lure to disguise the malicious intent. The presence of numerous embedded links to external PDFs, many hosted on Shopify, further supports the link farm heuristic.

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=adding+integers+worksheet+pdf
    • http://mexax.woofgangnco.com/uploads/1/3/0/9/130968984/a3371ea2dc923e.pdf
    • http://fegobuwi.chrislchristoff.com/uploads/1/3/0/9/130969204/zideb.pdf
    • http://files.abbalonga.com/uploads/1/3/0/7/130740022/tofikonaremuk.pdf
    • http://files.armstrongfamilylaw.com/uploads/1/3/0/7/130738513/pezijivurejine.pdf
    • https://cdn.shopify.com/s/files/1/0429/1185/8855/files/58419858171.pdf
    • https://cdn.shopify.com/s/files/1/0428/9980/0217/files/jadebewiselipa.pdf
    • https://cdn.shopify.com/s/files/1/0429/1480/7974/files/worigixafafulitipemu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8652/0224/files/11933371373.pdf
    • https://cdn.shopify.com/s/files/1/0433/4669/0203/files/65806036329.pdf
    • https://cdn.shopify.com/s/files/1/0431/4634/6658/files/apoptosis_intrinsic_and_extrinsic_pathway_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0431/0492/7905/files/58857730082.pdf
    • https://cdn.shopify.com/s/files/1/0428/3331/3958/files/the_adventures_of_tintin_volume_1.pdf
    • https://cdn.shopify.com/s/files/1/0434/7238/8246/files/mujitepemivemone.pdf
    • https://cdn.shopify.com/s/files/1/0433/8771/5742/files/18406886395.pdf
    • https://cdn.shopify.com/s/files/1/0429/8512/8090/files/82888791627.pdf
    • https://cdn.shopify.com/s/files/1/0438/0796/5345/files/25065102555.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_off000063f8.bin
beb5422068eff0b6baf2aaca61929357687cd17060b40e04fcc4b3c7c005a9db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63F8 5204 bytes
font_01_sfnt_off000075c0.bin
f7cc69e0a51aea945e68ff91100068023102f2d0fbdf93cdaf2355ebd5857e1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75C0 10152 bytes

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