Malicious PDF — malware analysis report

Static analysis result for SHA-256 57d2d6882b06fa69…

MALICIOUS

PDF

47.7 KB Created: 2020-09-01 11:45:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 191d71794342e124594be2382d8f278d SHA-1: f3074bce4871703849a2801f635a2ac7238e0301 SHA-256: 57d2d6882b06fa69b5b865927957de38eaca36b424fef2d7d918b97e4b5a1d13
152 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, also contains this URL. The ML classifier strongly flagged this PDF as malicious. The presence of embedded URLs and the redirector link suggest a phishing or redirection attack.

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/wix?keyword=android.+support.+v7.+widget.+cardview+dependency+gradle
    • https://static.usrfiles.com/ugd/7ef0dc_de37859d95bf41619423684e6aedfe6d.pdf
    • https://static.usrfiles.com/ugd/b8c837_f5eccc9b80a5459c9e43c2885ebfc1c8.pdf
    • https://static.usrfiles.com/ugd/0a593f_1953f70c85e647a89acd78b6bdc8a8a4.pdf
    • https://static.usrfiles.com/ugd/0f5b72_a441083e7c624059b63084451f666206.pdf
    • https://static.usrfiles.com/ugd/158fb9_01aafd6368224b0084f9fbac9d9e5015.pdf
    • https://static.usrfiles.com/ugd/c6ac46_646435a7ebfb4f9a840e37183cc7f5c1.pdf
    • https://static.usrfiles.com/ugd/f515ca_7a2f931c6c3d47729933433770e3aaf7.pdf
    • https://static.usrfiles.com/ugd/e4ff69_c72dcd47bf0b48a883995cba48095bb4.pdf
    • https://static.usrfiles.com/ugd/1c8c6c_60306df71f5d437fa97f9d6f7f96f517.pdf
    • https://static.usrfiles.com/ugd/b6edda_4038fab8730746859ddfea6014018e07.pdf
    • https://cdn.shopify.com/s/files/1/0427/5293/4044/files/35886702423.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lewajoranuputefikilos.pdf
    • https://static.usrfiles.com/ugd/b0cd75_d731730c056d4e5eb4d923eee5c629ee.pdf
    • https://static.usrfiles.com/ugd/07e02c_fcbd0cea893d40d58b31d8ddfbdb81b3.pdf
    • https://static.usrfiles.com/ugd/b8c837_2e3a30113151436e925358d05a45388e.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/
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lewajoranuputefikilos

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d43.bin
a26d79036cb3f3735df8acd4287a8e3af5dbd9eb8aaacf1ed3e79c9c74ee0722		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D43 5480 bytes
font_01_sfnt_off00008011.bin
d269e57d51652b54979d7dfa52eedcc4b5cf44f4ecda89229eb068d9cd8f93aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8011 10224 bytes
font_02_sfnt_off0000a324.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA324 4324 bytes

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