Malicious PDF — malware analysis report

Static analysis result for SHA-256 a669546cd585f7d2…

MALICIOUS

PDF

68.3 KB Created: 2020-08-09 06:54:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0672a7baf512d8f89d1241ccf0f1377b SHA-1: 89439dce86980b5716bb74bed44d52e10e8028fb SHA-256: a669546cd585f7d2402430aaff777469979a4f708266659e821718c8ab5500a5
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=asbabun+nuzul+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. Additionally, the PDF exhibits characteristics of a link farm, with numerous external links, many hosted on Shopify. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, limiting the analysis of specific execution techniques.

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.cc/pify?keyword=asbabun+nuzul+pdf
    • http://fekowur.fcalynn.org/uploads/1/3/2/8/132814930/cf92d55c126fe.pdf
    • http://files.faithforher.com/uploads/1/3/1/8/131871740/mivesodenat_rotifizadisobo_jipaxezaku_puxalus.pdf
    • http://files.takemetothekittens.com/uploads/1/3/0/7/130775848/9741059.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8865/files/6393692059.pdf
    • https://cdn.shopify.com/s/files/1/0431/3228/9178/files/adobe_photoshop_tutorials_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0449/5107/7032/files/soccer_weight_lifting_program.pdf
    • https://cdn.shopify.com/s/files/1/0434/5721/6678/files/75338573937.pdf
    • https://cdn.shopify.com/s/files/1/0431/5483/3564/files/4729840048.pdf
    • https://cdn.shopify.com/s/files/1/0432/5310/4790/files/96012145402.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/67062005494.pdf
    • https://cdn.shopify.com/s/files/1/0427/9320/5916/files/64509990277.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/dowofitedoginugeliv.pdf
    • https://cdn.shopify.com/s/files/1/0432/3927/6699/files/merejemiloforodekubovarij.pdf
    • https://cdn.shopify.com/s/files/1/0433/4813/2008/files/kidinipemekisowakur.pdf
    • https://cdn.shopify.com/s/files/1/0427/9762/9596/files/nabagimelugop.pdf
    • https://cdn.shopify.com/s/files/1/0432/0290/4222/files/bsc_nursing_1st_year_biochemistry_book.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a5da.bin
537400c80a4b19e76d9749105a2b017013254c51fc1bcebe0e747874065691a2
pdf-font-stream PDF embedded font (sfnt) at offset 0xA5DA 4644 bytes
font_01_sfnt_off0000b5a2.bin
cbf82d4e9d76a816d1d42a9a14d704b02b2481f9d92c3ed69234ff3b59fb95df
pdf-font-stream PDF embedded font (sfnt) at offset 0xB5A2 10220 bytes
font_02_sfnt_off0000d8d8.bin
2a611eaa2761144ef89e384114e389d0c6e5df24f6928b63eb036626b94095e2
pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D8 18096 bytes
font_03_sfnt_off0000f435.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230
pdf-font-stream PDF embedded font (sfnt) at offset 0xF435 4324 bytes