Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e48f6a1d8f8b438…

MALICIOUS

PDF

47.7 KB Created: 2020-08-25 08:56:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 012d955046dca537eb3252aa072d9668 SHA-1: 54b43c7cfeb5824a83939d30d7b04f78349281a7 SHA-256: 2e48f6a1d8f8b438c63e97938ac39d77d8053b4f9845d284326758e86005a875
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link to a redirector hosted on 'ttraff.com', which is flagged as malicious. It also exhibits characteristics of a PDF link farm, with numerous embedded links pointing to external PDFs, likely for SEO manipulation or to obscure the malicious redirector. The ML classifier strongly supports a malicious verdict. The primary attack vector appears to be social engineering via a deceptive link within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/pify?keyword=flow+cytometry+basics+guide+bio+rad
    • http://files.mkrishnan.org/uploads/1/3/0/7/130739719/53681a103b5b98d.pdf
    • https://cdn.shopify.com/s/files/1/0432/9875/0619/files/kuxufanofelonavixipuxovi.pdf
    • https://cdn.shopify.com/s/files/1/0450/5973/5704/files/tiene_futuro_el_capitalismo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/tinavurafofikaga.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/21072830013.pdf
    • https://cdn.shopify.com/s/files/1/0429/4764/1511/files/26047845018.pdf
    • https://cdn.shopify.com/s/files/1/0435/8438/9275/files/40975430690.pdf
    • https://cdn.shopify.com/s/files/1/0432/3390/2760/files/fudisixetipiduwetim.pdf
    • https://cdn.shopify.com/s/files/1/0462/7372/4576/files/7712952906.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005eab.bin
2a193db4d925253b1e616c95792d2da82ecf87a004c68d372bd81f0d7f350f19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EAB 5324 bytes
font_01_sfnt_off000070d3.bin
d7e443e5ab205088d307967d66acc53c311bc7f1ddeb178c3383f3442ae9528b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70D3 16588 bytes
font_02_sfnt_off0000a455.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA455 4324 bytes

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