Malicious PDF — malware analysis report

Static analysis result for SHA-256 fda0749283d0bdf3…

MALICIOUS

PDF

51.9 KB Created: 2020-07-21 16:55:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96c3a58e95b822dfa5b4380cd2672a3c SHA-1: f7dd82a543ec1c91b44728b6504f9b3b6305cd9b SHA-256: fda0749283d0bdf363654eb01c811fc58bb7981487269761b5e1bb8b974b002e
150 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, with a high number of embedded URLs. One of these URLs, 'https://ttraff.ru/wb?keyword=larva%20migrans%20tratamento%20pdf%20pediatria', is flagged as a malicious redirector. The presence of numerous links, including those hosted on Shopify, suggests an attempt to manipulate search engine results or lure users to malicious sites. The ML classifier also strongly indicated maliciousness.

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.ru/wb?keyword=larva%20migrans%20tratamento%20pdf%20pediatria
    • http://files.keppelcoastcameraclub.com/uploads/1/3/2/6/132681536/kuzili.pdf
    • http://files.rantofaretailer.com/uploads/1/3/0/9/130969424/leguwun_fuzulozug_vofiza_derigizenuvin.pdf
    • http://files.justicefordrew.com/uploads/1/3/0/7/130775196/8618609.pdf
    • https://cdn.shopify.com/s/files/1/0438/4371/5229/files/muwikomulufaxabobadepi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6088/7705/files/35937112697.pdf
    • https://cdn.shopify.com/s/files/1/0433/3414/0056/files/peraxewikiwijilujejuboxi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7252/0353/files/79532286970.pdf
    • https://cdn.shopify.com/s/files/1/0433/0268/2789/files/49164542235.pdf
    • https://lirizokese.files.wordpress.com/2020/07/8486784530.pdf
    • https://womimoxik.files.wordpress.com/2020/06/35692953774.pdf
    • https://pasodota.files.wordpress.com/2020/07/90997557385.pdf
    • https://mabozewunes.files.wordpress.com/2020/07/kumofojatud.pdf
    • https://kosupapa.files.wordpress.com/2020/07/bedutotatubiregi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7103/6835/files/jexotu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7221/6483/files/nibupafiluj.pdf
    • https://cdn.shopify.com/s/files/1/0435/7881/8715/files/suruvobifuseruzemuw.pdf
    • https://cdn.shopify.com/s/files/1/0431/6191/1458/files/54837849544.pdf
    • https://cdn.shopify.com/s/files/1/0431/6237/0210/files/parapaneguxen.pdf
    • https://cdn.shopify.com/s/files/1/0428/2531/8563/files/74256192890.pdf
    • https://cdn.shopify.com/s/files/1/0432/7889/3214/files/jitisubofewudodafafasarov.pdf
    • https://cdn.shopify.com/s/files/1/0436/2688/9374/files/98701502615.pdf
    • https://cdn.shopify.com/s/files/1/0433/5491/4981/files/85769951955.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/
    • https://cdn.shopify.com/s/files/1/0430/7

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008723.bin
4cf0b315f7299759190ac5d8b5b6eef83aa199df3eb3263418398d995115bd12
pdf-font-stream PDF embedded font (sfnt) at offset 0x8723 5116 bytes
font_01_sfnt_off00009877.bin
9d526b32c102e77a0fd3b495f8470082df043df40492d667d58b83a576369a31
pdf-font-stream PDF embedded font (sfnt) at offset 0x9877 13108 bytes