Malicious PDF — malware analysis report

Static analysis result for SHA-256 a54f6d8950e8be41…

MALICIOUS

PDF

44.5 KB Created: 2020-08-06 04:32:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c08d6826496415bac35519af636a7540 SHA-1: ed6910a5e228ecb78b03ac44eca29ff950a29760 SHA-256: a54f6d8950e8be412f90fe28532a0f5bf5d71cfce36e55242a4de4fa22829b14
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a prominent link disguised as a free calendar, which is a common lure for phishing or malware distribution. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms that the primary URL leads to known malicious infrastructure. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many of which are likely part of a link farm designed to improve search engine ranking for 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=calendario+annuale+2020+pdf+gratis
    • http://files.gmcceuref.co.uk/uploads/1/3/1/3/131398591/tepukixaveviwuk.pdf
    • http://files.pvrr.org/uploads/1/3/1/4/131438583/wexujuvemivojepipur.pdf
    • http://files.magiqatlas.com/uploads/1/3/0/8/130814513/zivatemurijupizowigi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8488/1825/files/45714195120.pdf
    • https://cdn.shopify.com/s/files/1/0427/8432/5798/files/bevulajoz.pdf
    • https://cdn.shopify.com/s/files/1/0438/4358/4162/files/52609224406.pdf
    • https://cdn.shopify.com/s/files/1/0430/9565/4554/files/90601021425.pdf
    • https://cdn.shopify.com/s/files/1/0431/7318/3637/files/tefuxavalugibokenetuf.pdf
    • https://cdn.shopify.com/s/files/1/0433/6071/4904/files/78246486583.pdf
    • https://cdn.shopify.com/s/files/1/0428/0261/0335/files/83560418834.pdf
    • https://cdn.shopify.com/s/files/1/0439/6482/5758/files/81285260145.pdf
    • https://cdn.shopify.com/s/files/1/0440/7197/7110/files/subtracting_integers_on_a_number_line_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0435/5063/8241/files/kojidajej.pdf
    • https://cdn.shopify.com/s/files/1/0430/8366/1461/files/vesarupobora.pdf
    • https://cdn.shopify.com/s/files/1/0428/6968/6431/files/blackfathom_villainy_classic.pdf
    • https://cdn.shopify.com/s/files/1/0431/5031/1579/files/career_development_interventions_in_the_21st_century_5th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/9122/1911/files/pobusuwefoda.pdf
    • https://cdn.shopify.com/s/files/1/0433/5045/8520/files/28765415352.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_off00006c72.bin
beda073d4a30eb90567ee3dbdab9246bce005a1a3fa950d8c0666a2156c887c7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C72 5388 bytes
font_01_sfnt_off00007ece.bin
f406f285575e2e4415d988386113c6cd39937cde82735c1ba5227a4649f61c16
pdf-font-stream PDF embedded font (sfnt) at offset 0x7ECE 11700 bytes