Malicious PDF — malware analysis report

Static analysis result for SHA-256 df2dbede2088d19d…

MALICIOUS

PDF

51.0 KB Created: 2020-08-22 14:39:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e887d14fb89b69106d9d42edb10fa7c7 SHA-1: 5984a21c8a2a90c9895a73b7ee987dc42f0e9d19 SHA-256: df2dbede2088d19db517e52a8adafb098be0fdf16e8c5b427965c1b810618cef
154 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 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL and keywords related to movie songs, suggesting a lure. The PDF also hosts a large number of external links, many pointing to Shopify, which is indicative of a link farm used for SEO poisoning or to obscure the true malicious destination.

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=narasimha+telugu+movie+songs+free++320kbps
    • http://jiredor.louiseexplores.co.uk/uploads/1/3/2/6/132696414/segalu-tozopakogafo-jenuwanozi.pdf
    • http://files.cauchonphoto.com/uploads/1/3/2/7/132710491/4199281.pdf
    • https://cdn.shopify.com/s/files/1/0436/0175/6323/files/self_tie_bow_tie_pattern.pdf
    • https://cdn.shopify.com/s/files/1/0432/5618/4992/files/refoxofeg.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/62856854762.pdf
    • https://cdn.shopify.com/s/files/1/0432/0015/1707/files/93424640024.pdf
    • https://cdn.shopify.com/s/files/1/0429/6232/1567/files/amma_bhavani_durga_bhavani_song.pdf
    • https://cdn.shopify.com/s/files/1/0462/5507/9573/files/zawiwakogopuvelukibitegan.pdf
    • https://cdn.shopify.com/s/files/1/0432/2010/7424/files/chapters_interactive_stories_unlimited_diamonds_mod_apk.pdf
    • https://cdn.shopify.com/s/files/1/0430/8716/7641/files/romujifujikibituxuvif.pdf
    • https://cdn.shopify.com/s/files/1/0436/9291/6886/files/75073411166.pdf
    • https://cdn.shopify.com/s/files/1/0435/3982/4799/files/conditional_probability_examples.pdf
    • https://cdn.shopify.com/s/files/1/0434/0829/4044/files/basic_automobile_engineering_book_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/0497/7564/files/70510758337.pdf
    • https://cdn.shopify.com/s/files/1/0433/8096/5534/files/pekiperafatiwowod.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_off00007d92.bin
479415125bb2f1a52f9a71c00bcd2f7ff91727a37d36cbf57425537704904470
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D92 5984 bytes
font_01_sfnt_off000091dc.bin
0c5c0861a34ba561671e8fb689ca474f8d5f54b2647e5b63baf40fe7c45a102b
pdf-font-stream PDF embedded font (sfnt) at offset 0x91DC 14368 bytes