Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b3d80d01dbc83b0…

MALICIOUS

PDF

42.6 KB Created: 2020-07-10 09:47:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee3d984f90185a5574adec10bb7c1fb3 SHA-1: 33a8eddfdf678617ccdf529b4b2fd40ddd0e4105 SHA-256: 1b3d80d01dbc83b01837a74f07675f93d98dc21b1fbe3a48193885cefa81597f
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One prominent link redirects to 'ttraff.com', a known malicious redirector. The document body, though partially corrupted, contains text related to a PDF title and the authoring application, suggesting a lure to download a seemingly legitimate document. The presence of numerous SEO-like URLs indicates a link farm designed to distribute 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/wb?keyword=halliday%20resnick%20walker%2010th%20edition%20pdf
    • http://files.tkdonlineregistration.com/uploads/1/3/2/3/132303378/bevodineg_xitudosesivono_sutifoguv_kabarobanevusot.pdf
    • http://files.longjourneyhome.net/uploads/1/3/0/8/130874582/5963903.pdf
    • http://files.loveyoursass.com/uploads/1/3/0/7/130738825/tumaxataxusixivukexa.pdf
    • http://files.authorrnewson.com/uploads/1/3/1/4/131453045/0be2c681a2ef9.pdf
    • http://files.art2day.co.uk/uploads/1/3/0/8/130874295/201e32d0c60d.pdf
    • http://files.pamsteashoppe.com/uploads/1/3/1/3/131384789/59b03f6f49c09c.pdf
    • http://files.vividboutiquehsv.com/uploads/1/3/2/6/132681293/xidinotakawiz.pdf
    • http://files.event-guru.co.uk/uploads/1/3/2/8/132814473/jesemokuba.pdf
    • http://files.gentrylaw.com/uploads/1/3/2/8/132815175/4835937.pdf
    • http://files.naeaglemulch.com/uploads/1/3/1/6/131606271/gakij_vijepajaburud_wezifataj_mevovidafep.pdf
    • https://wokovimi.files.wordpress.com/2020/06/75755475465.pdf
    • https://vajowobago.files.wordpress.com/2020/06/gabajusowafopufarine.pdf
    • https://lilelefog888926321.files.wordpress.com/2020/06/67489812637.pdf
    • https://boworuw.files.wordpress.com/2020/06/19561731039.pdf
    • https://widodufe.files.wordpress.com/2020/07/xufodipuxemotuzajajide.pdf
    • https://dusikixitew.files.wordpress.com/2020/07/39742443005.pdf
    • https://jisezos.files.wordpress.com/2020/06/xudijomubinetowavijaro.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kofuf.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xawifakupubegezixezo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46391305542.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_off000067a7.bin
1cea755100c5a781bcecfcad29fa41a1361f6ed33962c625eafea56a374d09a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67A7 5444 bytes
font_01_sfnt_off00007a30.bin
9a8ccfb645bd655a79d02e3b57f9ddea58fd83db19d5c9c9b7114c2ed5e82721		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A30 10376 bytes

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