Malicious PDF — malware analysis report

Static analysis result for SHA-256 367ede89d2f6f35f…

MALICIOUS

PDF

40.6 KB Created: 2020-08-22 16:26:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bdd39faeb61a3d2fac66b819c8179056 SHA-1: 646f9826ed6c9935a08b2cca25e3a76c1b28db7b SHA-256: 367ede89d2f6f35f44c287cc7cc3229ae6a29377815651a2d58267d1e363655d
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass external link farm, with the primary malicious redirector being ttraff.cc. The document body, though heavily obfuscated, contains the string 'Mixed bag crossword answer' and the malicious URL, suggesting a lure to trick users into clicking the link. The PDF also contains numerous links to other PDFs hosted on various domains, likely part of a link farm to improve SEO or distribute malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=mixed+bag+crossword+answer
    • http://files.jessicaleemanton.com/uploads/1/3/1/3/131384797/265a1962db2.pdf
    • http://dironebux.sweetkittyanime.com/uploads/1/3/1/3/131383483/793ee4400e2.pdf
    • http://files.citrustreenursery.com/uploads/1/3/0/8/130874109/xifuga_sapobufida_xiseba_wosisube.pdf
    • http://files.marthalindsell.com/uploads/1/3/0/7/130776277/mexaza.pdf
    • https://cdn.shopify.com/s/files/1/0434/3640/8982/files/piano_christmas_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0432/3675/3570/files/minuet_in_g_major_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0431/3264/9636/files/git_remove_untracked_files.pdf
    • https://cdn.shopify.com/s/files/1/0431/8560/2721/files/38964214968.pdf
    • https://cdn.shopify.com/s/files/1/0435/8550/3393/files/measuring_and_monitoring_biological_diversity_standard_methods_for_mammals.pdf
    • https://cdn.shopify.com/s/files/1/0453/8466/3208/files/i_swear_song_mr_jatt.pdf
    • https://cdn.shopify.com/s/files/1/0435/8035/8811/files/dijul.pdf
    • https://cdn.shopify.com/s/files/1/0429/2280/3363/files/dikazofe.pdf
    • https://cdn.shopify.com/s/files/1/0435/5804/3807/files/accuweather_dover_de.pdf
    • https://cdn.shopify.com/s/files/1/0440/0034/6270/files/17410475597.pdf
    • https://cdn.shopify.com/s/files/1/0451/8179/6503/files/siligadir.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_off00006166.bin
4f0026264132f372f3f79968939937af2ab105e1f38703da6301f53223555fb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6166 5380 bytes
font_01_sfnt_off000073d7.bin
9e9480ad0cdba2bca34902d5a3bd6c9d8e968fb6c4204caa74e66bb1f68a10bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73D7 9940 bytes

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