Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c0b3a375392810a…

MALICIOUS

PDF

197.5 KB Created: 2020-08-29 19:12:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8597a86ab2e5e29a7bf02a15d062c73 SHA-1: eda4276fa0f008803dd59341de704e2ede0b4c3a SHA-256: 2c0b3a375392810a1096e13965c15fc24c3b884fa197cc78fc8c335aab125690
94 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/wix?keyword=quem+era+o+apostol+pablo+na+biblia'. The document body, though heavily obfuscated, contains this URL, suggesting it's the primary lure. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL in a PDF is a strong indicator of a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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/wix?keyword=quem+era+o+apostol+pablo+na+biblia
    • https://static.usrfiles.com/ugd/b8c837_5f0e8922dfd942efa2013882555d4d27.pdf
    • https://static.usrfiles.com/ugd/b8c837_f04ff70ac2c7404db8eb1046660cbc7d.pdf
    • https://static.usrfiles.com/ugd/b8c837_5890738ab8194d409fb46014ba53d5ac.pdf
    • https://static.usrfiles.com/ugd/b8c837_c7d1ec383439454f8aa18a8951e5aa54.pdf
    • https://cdn.shopify.com/s/files/1/0433/0645/1094/files/juzedizazaboki.pdf
    • https://cdn.shopify.com/s/files/1/0427/5834/0774/files/12649699884.pdf
    • https://cdn.shopify.com/s/files/1/0433/5032/7454/files/navarolifojif.pdf
    • https://cdn.shopify.com/s/files/1/0436/5107/2153/files/buku_akuntansi_keuangan_menengah_1.pdf
    • https://cdn.shopify.com/s/files/1/0438/3624/4118/files/43019941424.pdf
    • https://cdn.shopify.com/s/files/1/0462/2693/1863/files/gw2_ascended_armor_crafting_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/4303/6053/files/divorce_agreement_template.pdf
    • https://cdn.shopify.com/s/files/1/0437/5930/4865/files/93122432323.pdf
    • https://cdn.shopify.com/s/files/1/0438/1471/5549/files/3238276077.pdf
    • https://cdn.shopify.com/s/files/1/0451/2422/3141/files/best_books_to_read_2020_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/9930/6650/files/kawajegenomonewovewizitap.pdf
    • https://cdn.shopify.com/s/files/1/0433/7978/5891/files/visafedosedezimisifozu.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_off0002c1d9.bin
12ae99a18d8be54972e26acb4e4ada9f82ef925b25000ef5f0b6238d722ed703
pdf-font-stream PDF embedded font (sfnt) at offset 0x2C1D9 5164 bytes
font_01_sfnt_off0002d347.bin
bff6e21d0007ecda6bab802d5a1d8e7911083e49179d9a6d000d9eb7e01b450b
pdf-font-stream PDF embedded font (sfnt) at offset 0x2D347 17592 bytes