Malicious PDF — malware analysis report

Static analysis result for SHA-256 9346fb484b078c6a…

MALICIOUS

PDF

48.3 KB Created: 2020-08-08 13:41:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 259862048d137c5bc9bb1964bd6d03d7 SHA-1: f12e4f77cce38866957ae78f14054440874b3501 SHA-256: 9346fb484b078c6a8141dec19ab8393765a6c2d257235d47de668ea09534a4d3
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one heuristic specifically identifying it as a 'PDF SEO Link Farm'. The primary malicious link, 'https://ttraff.ru/pify?keyword=important+synonyms+and+antonyms+list+for+ssc+exam+pdf', is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains this URL and other links, suggesting a lure to external content that is likely malicious or deceptive.

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=important+synonyms+and+antonyms+list+for+ssc+exam+pdf
    • http://files.professorwillis.com/uploads/1/3/1/4/131455232/2d3fa4394c559.pdf
    • http://files.timferriss.com/uploads/1/3/0/7/130775701/wawabofa-xabaf-mowojibebid.pdf
    • http://files.mrshammondhistory.com/uploads/1/3/0/8/130814238/lepadiwegi-bifonej-sixivu-xupuzatafivate.pdf
    • http://files.wanderwellfitness.com/uploads/1/3/0/7/130739835/e803125cd269.pdf
    • https://cdn.shopify.com/s/files/1/0449/9714/8836/files/al_quran_versi_indonesia.pdf
    • https://cdn.shopify.com/s/files/1/0430/0311/7719/files/jotakabo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lexopiwalosadatijasaz.pdf
    • https://cdn.shopify.com/s/files/1/0430/8844/5604/files/42959345841.pdf
    • https://cdn.shopify.com/s/files/1/0429/0982/7231/files/82761349535.pdf
    • https://cdn.shopify.com/s/files/1/0432/6778/4864/files/moguvofazezofameduxujuk.pdf
    • https://cdn.shopify.com/s/files/1/0430/6573/7370/files/58966932435.pdf
    • https://cdn.shopify.com/s/files/1/0434/5783/9254/files/lujiresadovilukatido.pdf
    • https://cdn.shopify.com/s/files/1/0431/7125/0335/files/fitalofok.pdf
    • https://cdn.shopify.com/s/files/1/0435/3123/9588/files/24777421200.pdf
    • https://cdn.shopify.com/s/files/1/0433/2666/8952/files/pupejajelaku.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48975286879.pdf
    • https://cdn.shopify.com/s/files/1/0430/9080/4893/files/fozozuziza.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_off00007ebd.bin
02196be66445a17fe3d711cd6b67d11bad035eac624c393fd8a2a837c0a2b865		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EBD 5408 bytes
font_01_sfnt_off00009116.bin
b5181b79429b81cfb524627ef777101e99de23047ed5d03999d8e1522799a955		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9116 10180 bytes

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