Malicious PDF — malware analysis report

Static analysis result for SHA-256 5872f1d4c3700e30…

MALICIOUS

PDF

125.6 KB Created: 2020-08-31 10:27:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97d83f407bc21b2b98d1b160945c4932 SHA-1: 834ec85fd6eac06ae336887428dd2007fd5cdef1 SHA-256: 5872f1d4c3700e30fb241445b6db35f739a6834c7abc526c44fd1896cadc2607
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.me/wix?keyword=poe+minion+speed'. Additionally, it features a PDF link farm heuristic, with the first URL being 'https://cdn.shopify.com/s/files/1/0435/7256/0031/files/caballo_de_troya_2_libro_completo.pdf'. The ML classifier also strongly flagged this PDF as malicious. The document body contains obfuscated text and the target URL, suggesting a lure to a malicious site.

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.me/wix?keyword=poe+minion+speed
    • https://cdn.shopify.com/s/files/1/0435/7256/0031/files/caballo_de_troya_2_libro_completo.pdf
    • https://cdn.shopify.com/s/files/1/0436/6453/9798/files/57199686365.pdf
    • https://cdn.shopify.com/s/files/1/0437/8987/7408/files/commandos_1_full_game_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/4614/1093/files/76754113382.pdf
    • https://cdn.shopify.com/s/files/1/0431/8317/7885/files/76873353131.pdf
    • https://cdn.shopify.com/s/files/1/0428/3914/6662/files/xuwavevedujufe.pdf
    • https://cdn.shopify.com/s/files/1/0429/0910/6343/files/pabepozopevoraguzetunoku.pdf
    • https://cdn.shopify.com/s/files/1/0429/4279/1839/files/destination_b2_grammar_and_vocabulary_with_answer_key_chomikuj.pdf
    • https://cdn.shopify.com/s/files/1/0431/2278/6466/files/papaxidemoremorasowunofir.pdf
    • https://cdn.shopify.com/s/files/1/0432/2508/8168/files/arbitration_act_1996_uk.pdf
    • https://cdn.shopify.com/s/files/1/0458/9620/4442/files/android_assets_file_url.pdf
    • https://cdn.shopify.com/s/files/1/0430/3945/7431/files/falco_arturo_perez_reverte.pdf
    • https://cdn.shopify.com/s/files/1/0438/5816/5925/files/brave_soul_dress_size_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/8669/3023/files/72309649996.pdf
    • https://cdn.shopify.com/s/files/1/0435/4464/1685/files/22732057309.pdf
    • https://cdn.shopify.com/s/files/1/0429/8863/4266/files/javamuwazaro.pdf
    • https://cdn.shopify.com/s/files/1/0435/2779/8944/files/xakonuvifexuvuxa.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_off00019da3.bin
a85b49feccf1b01021e6b0c1ed77f51c234ecfe5cae1ba36fa72e207d88af6cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x19DA3 4476 bytes
font_01_sfnt_off0001acad.bin
c5838b5650598cf57dfe14c5d24b216fd128eceec874e0c467afe3c3aa52a38f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1ACAD 14596 bytes
font_02_sfnt_off0001dabe.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x1DABE 4324 bytes