Malicious PDF — malware analysis report

Static analysis result for SHA-256 32809f3522664861…

MALICIOUS

PDF

46.9 KB Created: 2020-08-20 07:17:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 141b9f9bb31b3418cb38b702598051a8 SHA-1: d282e289b6cec6c2dad475ac3e16c2655a533539 SHA-256: 32809f35226648612eb157ad9085e773a032904dd31967981c84c28c07f505d0
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a critical heuristic identifying it as a redirector link to known malicious infrastructure. Additionally, it was identified as a PDF link farm containing numerous external links. The primary malicious URL identified is https://ttraff.ru/pify?keyword=sky+movies.+com+2018, which is likely used to lure victims. The document body contains obfuscated text and embedded URLs, further supporting the malicious intent.

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/pify?keyword=sky+movies.+com+2018
    • http://files.brockandtanj.com/uploads/1/3/1/4/131406518/laxopunoditonivuw.pdf
    • http://files.sendingasmokesignal.org/uploads/1/3/1/8/131856277/guxovago.pdf
    • http://files.lawmemphis.com/uploads/1/3/2/6/132681398/501890.pdf
    • https://cdn.shopify.com/s/files/1/0428/2341/8019/files/77891376895.pdf
    • https://cdn.shopify.com/s/files/1/0428/4681/4374/files/cambridge_english_prepare_level_5_workbook.pdf
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/rogolewofimi.pdf
    • https://cdn.shopify.com/s/files/1/0437/5828/9045/files/resunigesemuvile.pdf
    • https://cdn.shopify.com/s/files/1/0441/4029/8392/files/37077732342.pdf
    • https://cdn.shopify.com/s/files/1/0449/6467/5752/files/73633259463.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9805/files/nodokinekimu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8371/0117/files/vekuno.pdf
    • https://cdn.shopify.com/s/files/1/0431/9261/5073/files/kampala_international_university_fees_structure.pdf
    • https://cdn.shopify.com/s/files/1/0431/0253/5840/files/vedapelunoxinobopaxurusa.pdf
    • https://cdn.shopify.com/s/files/1/0434/6124/7129/files/27001913541.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_off000078f4.bin
09e5e3f3f20a952d79afc0e4dd335b8206a4f6ac52bd973278c158624532a665
pdf-font-stream PDF embedded font (sfnt) at offset 0x78F4 5488 bytes
font_01_sfnt_off00008bb2.bin
083e6ccd1475de66cf7df0d4d4b8efa6c9bbc5de5baad2c8b1b1c775b3a74840
pdf-font-stream PDF embedded font (sfnt) at offset 0x8BB2 10304 bytes