Malicious PDF — malware analysis report

Static analysis result for SHA-256 74dccdaeb18fc572…

MALICIOUS

PDF

44.9 KB Created: 2020-08-30 15:30:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b292a723aa909f6ce36fd68f4c19cd7f SHA-1: fde8e0df2f4ca8e82ea6ff2f6421c4b0d36d2adf SHA-256: 74dccdaeb18fc5723f9f491bceedb634151ee573f23b71b2d52ce633974cdff0
150 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by multiple heuristics, including a critical alert for a malicious redirector link and a high ML score. The document contains a large number of embedded links, with a significant portion pointing to the malicious domain 'ttraff.ru'. This suggests the document is designed to lure users to malicious sites, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable binary data.

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/wix?keyword=%25D0%25BF%25D0%25B8%25D0%25BF%25D1%258F%25D0%25BA%25D0%25B8+%25D0%25BF%25D1%2580%25D0%25BE+%25D0%25B0%25D0%25BD%25D0%25B4%25D1%2580%25D0%25BE%25D0%25B8%25D0%25B4
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32686583269.pdf
    • https://cdn.shopify.com/s/files/1/0437/0323/8811/files/52071889783.pdf
    • https://cdn.shopify.com/s/files/1/0431/0581/2629/files/95890970764.pdf
    • https://cdn.shopify.com/s/files/1/0432/9363/8822/files/carboxiterapia_flacidez.pdf
    • https://cdn.shopify.com/s/files/1/0437/6847/9893/files/learning_strategies_in_psychology.pdf
    • https://cdn.shopify.com/s/files/1/0433/5291/6119/files/52761037570.pdf
    • https://cdn.shopify.com/s/files/1/0466/5144/1317/files/bulbous_plants.pdf
    • https://cdn.shopify.com/s/files/1/0427/6797/4556/files/12001188958.pdf
    • https://cdn.shopify.com/s/files/1/0427/7701/8524/files/pigalafexuxetugujer.pdf
    • https://cdn.shopify.com/s/files/1/0433/6451/5994/files/kojenipidatole.pdf
    • https://static.usrfiles.com/ugd/ad2ade_ad633450fbaf472fad8e5d4c30a887e7.pdf
    • https://static.usrfiles.com/ugd/a2c2bc_325aaca0879a48c087d34c6c110e13a6.pdf
    • https://static.usrfiles.com/ugd/b8c837_dcd2d19f2e0347388e6efd2680f7a612.pdf
    • https://static.usrfiles.com/ugd/b8c837_605c73bb4fdf4a62acfc805c535965d3.pdf
    • https://static.usrfiles.com/ugd/9b5f63_5e813e3f65da491e8f0188c0cf5f9b0f.pdf
    • https://static.usrfiles.com/ugd/963627_198fb17d3375435eaf8d291057ead1e0.pdf
    • https://static.usrfiles.com/ugd/b8c837_4820d587703c45f1bae3d88223922d31.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_off0000578c.bin
3dbb2bf58ba48c34b3e065f025ac4c78d9bcc91f01c9f493bd4dbb716757dafa
pdf-font-stream PDF embedded font (sfnt) at offset 0x578C 4340 bytes
font_01_sfnt_off00006643.bin
b5f4d041df77444ea9a5aac01baeaad878ad7e3cbdbb608b765a9bf70cb2ae8f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6643 15776 bytes
font_02_sfnt_off00009681.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9681 4324 bytes