Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce5b146e0d207af6…

MALICIOUS

PDF

41.1 KB Created: 2020-08-07 01:25:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a01a2154823a25c42a823898e8c27af1 SHA-1: 80f3f6c5f94db90ea6d9161576af32dc8f16a4b1 SHA-256: ce5b146e0d207af6494f6dc73c580e2ab98be6e9a584851ed6e152ec5dc57a53
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which are SEO-optimized lures pointing to PDF files. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to obscure the final destination. The document body, though heavily corrupted, contains text related to technical drawings and the malicious URL, suggesting a lure to trick users into clicking the link under the guise of academic material. No scripts were extracted from this sample.

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=difference+between+first+angle+projection+and+third+angle+projection+pdf
    • http://files.stlukeslanesboro.org/uploads/1/3/0/8/130814101/josulajosam_kivijiri_lozibaf_nijozu.pdf
    • http://files.westexaudioelectronics.com/uploads/1/3/0/7/130775635/detas.pdf
    • http://files.yorkieandmorkie.com/uploads/1/3/1/4/131437924/vukomazebaki-febem-figogozupid-papemapedo.pdf
    • https://cdn.shopify.com/s/files/1/0428/6332/9446/files/nipotun.pdf
    • https://cdn.shopify.com/s/files/1/0430/7399/4905/files/73883796141.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vabagibad.pdf
    • https://cdn.shopify.com/s/files/1/0433/0808/9509/files/a_level_chemistry_revision_notes_ocr.pdf
    • https://cdn.shopify.com/s/files/1/0433/9721/8460/files/25368734033.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kilezibuvi.pdf
    • https://cdn.shopify.com/s/files/1/0436/9245/8152/files/o_reilly_core_python_programming.pdf
    • https://cdn.shopify.com/s/files/1/0430/7327/4018/files/76452365357.pdf
    • https://cdn.shopify.com/s/files/1/0440/7263/2470/files/persuasive_writing_prompts_5th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0432/1994/3579/files/19397532910.pdf
    • https://cdn.shopify.com/s/files/1/0430/4420/8797/files/97772791067.pdf
    • https://cdn.shopify.com/s/files/1/0434/3015/0296/files/sda_church_hymnal_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/68333177186.pdf
    • https://cdn.shopify.com/s/files/1/0437/9148/3042/files/16129612134.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_off0000602b.bin
c5a8ab846534398c9c208dfae48163be81cc79e5f0a2880b8c1bf1ee76a1e8ef
pdf-font-stream PDF embedded font (sfnt) at offset 0x602B 5724 bytes
font_01_sfnt_off000073bf.bin
1d9d4522f48a3706dcfd2455b553530d6acf6ced834ae24b0633ed7c64be8228
pdf-font-stream PDF embedded font (sfnt) at offset 0x73BF 10276 bytes