Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddda473eaa4a4067…

MALICIOUS

PDF

48.8 KB Created: 2020-08-22 14:15:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9cef6fae3fd60ad82a86d906a902a3a SHA-1: c6af4c99b78851aaa691775cc5055ee7bfeeaca1 SHA-256: ddda473eaa4a4067521499af33c6f566d08d507a64421415a51f8f11cd251b6a
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to PDF files hosted on various domains. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely the primary malicious payload delivery mechanism. The document body, though heavily obfuscated, contains references to movie titles and URLs, reinforcing the lure. 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.cc/pify?keyword=baal+veer+2019++hd
    • http://files.innerrhythmsmusic.com/uploads/1/3/1/3/131381675/vafemabilor-fukevaf-manuve-lemakuk.pdf
    • http://files.niaimani.net/uploads/1/3/2/7/132741194/f4f62.pdf
    • http://files.lisaruschman.com/uploads/1/3/0/7/130740123/winuxeritikagut.pdf
    • http://files.futurescapes21c.com/uploads/1/3/0/7/130739211/vukaza.pdf
    • http://samawu.selangormodest.com/uploads/1/3/0/8/130874422/zogulidukajo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3486/8897/files/azhar_full_movie_hd_video.pdf
    • https://cdn.shopify.com/s/files/1/0434/0105/2310/files/94939581880.pdf
    • https://cdn.shopify.com/s/files/1/0432/5546/4104/files/varawopegugelebanovat.pdf
    • https://cdn.shopify.com/s/files/1/0431/8494/7357/files/gewuto.pdf
    • https://cdn.shopify.com/s/files/1/0432/6175/5560/files/32192900095.pdf
    • https://cdn.shopify.com/s/files/1/0440/8328/2070/files/kejuredutujubukudux.pdf
    • https://cdn.shopify.com/s/files/1/0437/2286/6842/files/upsc_cds_2020_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0432/5271/1582/files/43714519108.pdf
    • https://cdn.shopify.com/s/files/1/0432/4674/7805/files/88345777601.pdf
    • https://cdn.shopify.com/s/files/1/0435/5863/3631/files/mechanisms_in_homogeneous_and_heterogeneous_epoxidation_catalysis.pdf
    • https://cdn.shopify.com/s/files/1/0430/1763/3949/files/migulageparakuranewi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2832/4257/files/bstc_result_2018_rajasthan.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_off000067cc.bin
c6874a088140b762af0d591ecee868bb04ad6c1268629ae87680ec88a75a0941
pdf-font-stream PDF embedded font (sfnt) at offset 0x67CC 4772 bytes
font_01_sfnt_off00007811.bin
e994a6d106d4de318864cd9665c8dbc74fc7eed000b46e8660c2fe8da623a60f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7811 15964 bytes
font_02_sfnt_off0000a878.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0xA878 4324 bytes