Malicious PDF — malware analysis report

Static analysis result for SHA-256 17e9230322704d5a…

MALICIOUS

PDF

70.0 KB Created: 2020-08-09 18:27:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c496bd085ff1a6ce7045f63b6328b257 SHA-1: 367ae810a767fdfec49a2def0ca299eff7e10756 SHA-256: 17e9230322704d5a48eb9c2d87f1292419941caeb34f2c1c8ca9f550278eb8e6
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to suspicious domains, and one specific link to 'ttraff.cc' is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though garbled, contains the URL that is also present in the heuristics, suggesting the document's primary purpose is to redirect users to 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.cc/pify?keyword=introduction+to+the+calculus+of+variations+sagan+pdf
    • http://files.esposlawenforcement.com/uploads/1/3/2/7/132712235/fegovik-dobun-risazitela-fuxoxudi.pdf
    • http://files.rawdiamondhair.com/uploads/1/3/0/7/130775977/1685669.pdf
    • http://files.whitmancountypublichealth.org/uploads/1/3/0/7/130775434/fajire.pdf
    • http://files.agonyopera.com/uploads/1/3/1/3/131380163/1223523.pdf
    • http://nuxaju.phideberkeley.com/uploads/1/3/1/6/131636725/rumelojoxa-winulavewagit-watozoxen-jakobebixakuju.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0439/1262/6344/files/conglomerate_merger_example.pdf
    • https://cdn.shopify.com/s/files/1/0427/8022/9791/files/beruzitumazavagixedi.pdf
    • https://cdn.shopify.com/s/files/1/0436/0860/4829/files/lonubegerar.pdf
    • https://cdn.shopify.com/s/files/1/0432/0703/2990/files/lulijisi.pdf
    • https://cdn.shopify.com/s/files/1/0432/6499/9590/files/29976616182.pdf
    • https://cdn.shopify.com/s/files/1/0433/7932/7141/files/sudo_without_password.pdf
    • https://cdn.shopify.com/s/files/1/0432/4042/3592/files/wetizavidunu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8845/3533/files/zemova.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tivaluzisezulumavolo.pdf
    • https://cdn.shopify.com/s/files/1/0438/4797/5062/files/84174933656.pdf
    • https://cdn.shopify.com/s/files/1/0429/2621/1238/files/vuvejelatamoligaxulumu.pdf
    • https://cdn.shopify.com/s/files/1/0437/8276/6750/files/geographically_weighted_regression_the_analysis_of_spatially_varying_relationships.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xiguxalenagidofivixonagez.pdf
    • https://cdn.shopify.com/s/files/1/0431/6083/0116/files/furufewojob.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b0dd.bin
e1ed5d167658198d3d041e78a7ff80562582fc32021f56829b779317ab56de53		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0DD 5296 bytes
font_01_sfnt_off0000c2da.bin
b3355c02ea1e5c42b54d03a59a8b254df330acee6836499c320f5b8c1d391c61		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC2DA 10400 bytes
font_02_sfnt_off0000e6ae.bin
f7282090e270060608fdc575ded0b184a97243f724fc845514d2e81390c10c7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6AE 16144 bytes
font_03_sfnt_off0000fba9.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA9 4324 bytes

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