Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf9a2ebd1a72cb40…

MALICIOUS

PDF

55.5 KB Created: 2020-08-22 03:14:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9b2c9cd5e20e4a21116eb6bab7b9bf9 SHA-1: 64d3c23a0af41d86a7b895e4d44c20c98276daee SHA-256: bf9a2ebd1a72cb4094e49104da4375c472dada38a1f86dd1f94879cfdee493b7
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous links, including a critical redirector link to "ttraff.com". This indicates the document is designed to lure users to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. The presence of a link farm suggests an attempt to manipulate search engine results to distribute malicious content, likely leading to a second-stage download.

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.com/pify?keyword=blended+learning+pdf
    • http://fatovemu.nihc.ca/uploads/1/3/2/6/132683138/pezofugamokuk-fabipa-puzejulagog.pdf
    • http://nitopufe.majresearchgroup.com/uploads/1/3/0/9/130969592/sejidid.pdf
    • http://files.felicityclear.com/uploads/1/3/2/8/132814375/durirunonajoj_dusobeme_joluvebagudadat_jibogufibesat.pdf
    • https://cdn.shopify.com/s/files/1/0430/3729/4741/files/86324390402.pdf
    • https://cdn.shopify.com/s/files/1/0440/4497/6278/files/luranu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9590/8761/files/acoustic_absorbers_and_diffusers_theory_design_and_application.pdf
    • https://cdn.shopify.com/s/files/1/0428/5480/9759/files/vizufuguvifebasit.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/gotenurixuketojutaninebu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9979/1268/files/4500862595.pdf
    • https://cdn.shopify.com/s/files/1/0430/5348/2135/files/memphis_new_years_eve_2017.pdf
    • https://cdn.shopify.com/s/files/1/0428/3629/5836/files/evil_dead_movie_moviescounter.pdf
    • https://cdn.shopify.com/s/files/1/0429/1559/4399/files/linobewejawimipuso.pdf
    • https://cdn.shopify.com/s/files/1/0428/5195/8947/files/p90x_mass_schedule.pdf
    • https://cdn.shopify.com/s/files/1/0432/1784/6427/files/enlaces_2nd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0428/4973/0727/files/97_mitsubishi_eclipse.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_off00008f42.bin
847f965a93628960aff3d2f3f11941df99e1351cbab761f228841c20ebd4344e
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F42 4676 bytes
font_01_sfnt_off00009f29.bin
0e0ca767954387e78e4b64685e16385288410ac605db8cc3b64bc69eb7d774cb
pdf-font-stream PDF embedded font (sfnt) at offset 0x9F29 10596 bytes
font_02_sfnt_off0000c322.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0xC322 4324 bytes