Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c29707eedd5da56…

MALICIOUS

PDF

129.7 KB Created: 2020-09-10 17:45:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eaca727c18ae4e93136a5482aa58c571 SHA-1: a75a0dd18988162e2fd74563a82eccb1bcc37ab9 SHA-256: 2c29707eedd5da56636fa6dba1628e3560ea6eee4102d5be40735e95bd81ab97
154 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.ru/wb?keyword=buell%20xb12x%20manual'. Additionally, another critical heuristic indicates a PDF link farm, suggesting an attempt to manipulate search engine results or distribute content broadly. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of these malicious links indicates a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.ru/wb?keyword=buell%20xb12x%20manual
    • https://cdn.shopify.com/s/files/1/0435/8501/1869/files/ejercicios_de_sumas_y_restas_para_nios_de_primaria.pdf
    • https://cdn.shopify.com/s/files/1/0436/3943/9510/files/blood_money_bollywood_movie_480p.pdf
    • https://cdn.shopify.com/s/files/1/0430/4489/6925/files/pokemon_kanto_map.pdf
    • https://cdn.shopify.com/s/files/1/0432/1086/6851/files/68612086887.pdf
    • https://static.usrfiles.com/ugd/978dd5_292304cd081749858e8df928ee7c67e8.pdf
    • https://static.usrfiles.com/ugd/6116da_6233fb6435a74577b4b667c4f535006a.pdf
    • https://static.usrfiles.com/ugd/b8c837_0536c9bc57ad472bbb5a5fa32ff314f3.pdf
    • https://static.usrfiles.com/ugd/1f2646_7d06d5f4ea7a4c7894ed087f9a5d214b.pdf
    • https://static.usrfiles.com/ugd/d01287_c3b692de043c4627b20fa0bb942d555b.pdf
    • https://static.usrfiles.com/ugd/432b07_1c01422419264838a7c234e9a1f3f3b7.pdf
    • https://static.usrfiles.com/ugd/564d2e_ba48081ff94e4de7abfa21bf4e06e06b.pdf
    • https://static.usrfiles.com/ugd/b463f2_8aeb6255cb9145cf9a14b81cfe6537e5.pdf
    • https://static.usrfiles.com/ugd/b8c837_51de7105e05e4e798e6da468956b3eb4.pdf
    • https://static.usrfiles.com/ugd/38eac1_97018d6b42df4730bb35989f64e01e3a.pdf
    • https://static.usrfiles.com/ugd/5be868_9519f3dc5f054eb0824dd7b220cd7209.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_off0001b715.bin
a8dfb659c5ee7e50fbc3c57546adc0a45981a8e236d319a04bf995a2d1acd157
pdf-font-stream PDF embedded font (sfnt) at offset 0x1B715 4996 bytes
font_01_sfnt_off0001c80b.bin
c411d4802524205ba8fc85c10d804300ef67da9044f024a9ded1d1f8d6166d2f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1C80B 15956 bytes