Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0598627ad4139a6…

MALICIOUS

PDF

44.4 KB Created: 2020-08-18 14:44:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d3139d8eaf723eaa7bc480fd70102a96 SHA-1: d83e29bb065bf3a6269222880f08ccb6a7cdf421 SHA-256: d0598627ad4139a6f93adf8af9f1cd740207f14551e054d39d069f0c3cf82aca
152 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it is a redirector link to known malicious infrastructure. It also exhibits characteristics of a PDF SEO link farm, with numerous embedded links pointing to external PDFs. The primary malicious URL identified is https://ttraff.cc/pify?keyword=bajarangi+kannada+movie+video+songs, which likely serves as a lure or initial stage for further malicious activity.

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.cc/pify?keyword=bajarangi+kannada+movie+video+songs
    • http://files.janepooleart.com/uploads/1/3/2/6/132681824/64d225ebca69b.pdf
    • http://files.en.inmatesvoices.com/uploads/1/3/1/4/131438113/5024759.pdf
    • http://wutizobad.bendames.com/uploads/1/3/1/0/131070357/tijaleroxeziva_fixuvidu.pdf
    • http://files.billvliek.com/uploads/1/3/1/8/131858592/a8e7e418113.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/94448736580.pdf
    • https://cdn.shopify.com/s/files/1/0431/4539/6386/files/kejigito.pdf
    • https://cdn.shopify.com/s/files/1/0432/7315/8806/files/nemezixu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8095/7593/files/muzewero.pdf
    • https://cdn.shopify.com/s/files/1/0428/6713/0534/files/rufeverojuxibofa.pdf
    • https://cdn.shopify.com/s/files/1/0431/8298/1281/files/7057736456.pdf
    • https://cdn.shopify.com/s/files/1/0437/7647/5290/files/35294439141.pdf
    • https://cdn.shopify.com/s/files/1/0432/3006/8894/files/fiparavosegudiw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66083684812.pdf
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/65456220267.pdf
    • https://cdn.shopify.com/s/files/1/0433/4364/2792/files/algebra_and_trigonometry_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/8184/2341/files/dtv_channel_guide_2018.pdf
    • https://cdn.shopify.com/s/files/1/0432/0660/7012/files/vakewefowidirevivexo.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_off00006725.bin
7f4f6f1d3715f69304a893eaa39b77c97545b06593b90cdc2874b3ba7d4d6288		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6725 5360 bytes
font_01_sfnt_off00007959.bin
937b151db4c222dc8a0727a33a3aab31f19ea8cb9117427d8e1a613ff43ad753		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7959 14136 bytes

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