Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec24828a38e5c16c…

MALICIOUS

PDF

54.4 KB Created: 2020-08-10 13:58:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c4547f989bad52af76feab7a5708a103 SHA-1: f090b31aaf7db461f6f60fca216d80c114c1d7f5 SHA-256: ec24828a38e5c16cd05e9efd77da17901acdd8807fe39929314f0c6970b9dbd0
150 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 traff.com. Additionally, it exhibits a PDF link farm heuristic, suggesting an attempt to manipulate search engine results or distribute content. The ML classifier also flagged this PDF with high confidence. The presence of numerous embedded URLs, including the malicious redirector, indicates a likely attempt to lead the user to malicious content or a phishing site.

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.com/pify?keyword=federal+supreme+court+cassation+decisions+volume+12+pdf
    • http://lojaxive.derekjasnochmusic.com/uploads/1/3/0/8/130874038/nujawajizofosukogej.pdf
    • http://files.kamiley.com/uploads/1/3/1/4/131454034/570899.pdf
    • http://files.vicenzas-crostoli.com/uploads/1/3/1/4/131483253/9062675.pdf
    • http://files.triciadeed.com/uploads/1/3/1/3/131379875/kowit_gixidigexoj.pdf
    • http://files.rajaampatdivers.com/uploads/1/3/0/7/130739312/fosegeladosuwov.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/97072231683.pdf
    • https://cdn.shopify.com/s/files/1/0428/1538/9855/files/64626941621.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6651/files/25719086246.pdf
    • https://cdn.shopify.com/s/files/1/0433/6130/4728/files/descargar_biblia_de_estudio_reina_valera_1960_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0429/0910/6332/files/soxinojodasejunerejujesor.pdf
    • https://cdn.shopify.com/s/files/1/0432/5366/1851/files/banerux.pdf
    • https://cdn.shopify.com/s/files/1/0427/9464/7719/files/baseband_and_broadband.pdf
    • https://cdn.shopify.com/s/files/1/0433/7850/7934/files/57242800504.pdf
    • https://cdn.shopify.com/s/files/1/0431/8740/4968/files/35100102280.pdf
    • https://cdn.shopify.com/s/files/1/0429/4960/7590/files/gugotiwezirivegurusalasi.pdf
    • https://cdn.shopify.com/s/files/1/0428/3485/4051/files/13282919939.pdf
    • https://cdn.shopify.com/s/files/1/0436/5497/1557/files/kedawelo.pdf
    • https://cdn.shopify.com/s/files/1/0428/7712/4764/files/mastery_robert_greene_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/0473/1300/files/farmacos_antagonistas_adrenergicos.pdf
    • https://cdn.shopify.com/s/files/1/0435/6590/8136/files/tawefizoda.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_off000096ae.bin
87afd6cc668ae19bba94771f2490268b015d54bca6b2c6f4a40f56d580927d15
pdf-font-stream PDF embedded font (sfnt) at offset 0x96AE 5500 bytes
font_01_sfnt_off0000a95b.bin
030b1c5ae270d3098c8e29bc0d4a176789a8900b8487ce258bea2b22a6072d59
pdf-font-stream PDF embedded font (sfnt) at offset 0xA95B 10124 bytes