Malicious PDF — malware analysis report

Static analysis result for SHA-256 b303de580177056a…

MALICIOUS

PDF

42.5 KB Created: 2020-08-13 23:09:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a90d75fab9a27ab270bf99024cd856a9 SHA-1: dbce6a01b9c48fdb13875c753141f385ee6784c4 SHA-256: b303de580177056a0bc2d7494bb0d24bca06088fbb08cc800466eaadad3fbfe0
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing a malicious redirector link and a large number of external PDF links, indicating a link farm. The primary malicious URL identified is https://ttraff.ru/pify?keyword=eclipse+shortcuts+java, which is likely used to redirect users to a malicious site. The document body contains garbled text but also includes the same malicious URL and several benign-looking Shopify URLs, suggesting an attempt to obscure the malicious intent.

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/pify?keyword=eclipse+shortcuts+java
    • http://zanufe.alamodekabashsewingshop.com/uploads/1/3/2/8/132814930/jefuver.pdf
    • http://files.shannonmcferrinfineartist.com/uploads/1/3/1/4/131438013/liwozikapewusotojov.pdf
    • http://zokete.vi-vi.org/uploads/1/3/0/8/130814328/a95f82b5291.pdf
    • https://cdn.shopify.com/s/files/1/0435/5319/4133/files/equipos_de_control_de_contaminacion_atmosferica.pdf
    • https://cdn.shopify.com/s/files/1/0438/8388/8808/files/55509450893.pdf
    • https://cdn.shopify.com/s/files/1/0436/5815/0046/files/redol.pdf
    • https://cdn.shopify.com/s/files/1/0438/4745/0789/files/statistical_rethinking_2nd_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/2924/9694/files/python_true_false.pdf
    • https://cdn.shopify.com/s/files/1/0433/4059/5352/files/72791431931.pdf
    • https://cdn.shopify.com/s/files/1/0433/9875/8557/files/89956699707.pdf
    • https://cdn.shopify.com/s/files/1/0430/7258/5888/files/37082280017.pdf
    • https://cdn.shopify.com/s/files/1/0429/8499/7017/files/15453013610.pdf
    • https://cdn.shopify.com/s/files/1/0430/6354/1913/files/prentice_hall_america_history_of_our_nation_test.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/girotimovu.pdf
    • https://cdn.shopify.com/s/files/1/0440/1030/7749/files/95253629350.pdf
    • https://cdn.shopify.com/s/files/1/0431/1816/6167/files/pagawanagapivafonobaxi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7383/1066/files/19665752571.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_off00006947.bin
23d6f5193e1662f5c1a31ef5a965cbc7cebc36e8b88a2cea79674e0b9757c915
pdf-font-stream PDF embedded font (sfnt) at offset 0x6947 5112 bytes
font_01_sfnt_off00007aad.bin
3e4f5b1df6af3292adca2ea11bae7fa783afd560c324d785c60c0dc94644ec96
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AAD 10128 bytes