Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1ff71c9e3d610a8…

MALICIOUS

PDF

54.5 KB Created: 2020-08-24 05:20:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34014c40277285670fc116ca76b30bd6 SHA-1: eda7c8a381c6671399b472333fd0752f001a97a3 SHA-256: f1ff71c9e3d610a8c5bd5ce3fe0a22bfaabd4d5a3ea2321e3a759eabc83f201f
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded external links, a technique often used in SEO poisoning or to create link farms. One of the primary links, 'https://ttraff.com/pify?keyword=bodo+norway+map+pdf', is flagged as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body itself is heavily obfuscated and contains the malicious URL, suggesting an attempt to lure users to a compromised or malicious site.

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.com/pify?keyword=bodo+norway+map+pdf
    • http://jutof.meganclendenan.com/uploads/1/3/2/6/132683292/mibabogunika.pdf
    • http://goleji.annawitte.org/uploads/1/3/0/7/130776367/48aa61.pdf
    • https://cdn.shopify.com/s/files/1/0434/3624/5144/files/lemajojefixenibolife.pdf
    • https://cdn.shopify.com/s/files/1/0438/0390/2112/files/real_book_6th_edition_bb.pdf
    • https://cdn.shopify.com/s/files/1/0430/8333/3785/files/tewuwanokogono.pdf
    • https://cdn.shopify.com/s/files/1/0435/5633/9861/files/arya_2_movie_ringtones.pdf
    • https://cdn.shopify.com/s/files/1/0428/6427/9718/files/2202767219.pdf
    • https://cdn.shopify.com/s/files/1/0432/5310/4790/files/68412705121.pdf
    • https://cdn.shopify.com/s/files/1/0429/6838/3642/files/dijidizuweweweji.pdf
    • https://cdn.shopify.com/s/files/1/0432/5395/6758/files/jenis_jenis_metode_blanching.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_off00009764.bin
8885ab3e85eea80647442ec3bd169d35c4ec1b78524e4dd044a5aa7304ed5acc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9764 5220 bytes
font_01_sfnt_off0000a92e.bin
b3bb83d1938589150d86e5521fb3f86b17b1f4e466ed2383c456fcb1ea174c48		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA92E 10836 bytes

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