Malicious PDF — malware analysis report

Static analysis result for SHA-256 11ac1b4e7947e367…

MALICIOUS

PDF

41.6 KB Created: 2020-08-25 10:50:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6d641e3700680e36de43a4763d89b86 SHA-1: 0ff7a5d7bb32d0ec0808281bef75a28e35477ffa SHA-256: 11ac1b4e7947e367a91cdc13df4fe1546985c48ba1d4e9ecde382d98765ddac9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially obfuscated, includes the URL 'https://ttraff.com/pify?keyword=camera+translate+android+github', suggesting a lure to a malicious site. The presence of many external PDF links also indicates a link farm, a common tactic for SEO poisoning or distributing malicious content.

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=camera+translate+android+github
    • http://files.msrcampbell.com/uploads/1/3/0/7/130775701/vozimagefugi.pdf
    • http://files.lifecycleaquatics.com/uploads/1/3/0/7/130776055/wikelubesuresa.pdf
    • http://dofug.sdundiagnosedsupport.com/uploads/1/3/0/7/130738799/1842655.pdf
    • http://nabav.mccoypotterymuseum.com/uploads/1/3/1/1/131164250/mazopekonuzidone.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sujaxitedidubabupopivup.pdf
    • https://cdn.shopify.com/s/files/1/0433/2473/5643/files/12261752122.pdf
    • https://cdn.shopify.com/s/files/1/0429/6228/8793/files/colorado_consumer_use_tax_reporting_schedule.pdf
    • https://cdn.shopify.com/s/files/1/0434/6871/8233/files/78134648280.pdf
    • https://cdn.shopify.com/s/files/1/0432/3275/5875/files/aatish_movie_300mb.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/14192803693.pdf
    • https://cdn.shopify.com/s/files/1/0433/5491/4981/files/begixojovepagipe.pdf
    • https://cdn.shopify.com/s/files/1/0429/8581/6218/files/aeon_flux_full_movie_mp4.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f85.bin
d64e91e53ac27058cb956954b3b0e66396c6f22f8da41612c1413bd1fd27c35a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F85 5284 bytes
font_01_sfnt_off00007141.bin
e524014a0bf4fc3bc087069f13b87cb68e665cb119fa8ece3ee8d9ba2a98ab92
pdf-font-stream PDF embedded font (sfnt) at offset 0x7141 12320 bytes