Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5c9b39a07960226…

MALICIOUS

PDF

52.7 KB Created: 2020-08-17 17:37:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4f2e948179c01fe622a980a1ecd89aa SHA-1: 6ac5e548585f8c1f83b7fc381df17c5e6241ef2b SHA-256: a5c9b39a0796022668bfc679c0d4faaa71add94d1127a414728b7bbd99564c9e
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'powerpoint presentation templates creative' and the malicious URL. The ML classifier strongly flagged this PDF as malicious, indicating a sophisticated attempt to redirect users to harmful content.

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=powerpoint+presentation+templates+creative
    • http://files.maderakubo.com/uploads/1/3/1/4/131454012/vexogu-fusugesuwesim-girosigera.pdf
    • http://files.essentialleighsimple.com/uploads/1/3/1/1/131164472/33b576317e1aa.pdf
    • http://files.clairesanimalaffinity.com/uploads/1/3/1/1/131164157/metutifomuniki_vewamasomefan_mulizap_bazopo.pdf
    • http://files.blissfuleventplanners.com/uploads/1/3/1/3/131383892/totizeribex-tuzevu.pdf
    • http://nugakabi.gracebaptistlynden.com/uploads/1/3/0/8/130874588/zutuwojipaf-milupatizotona.pdf
    • https://cdn.shopify.com/s/files/1/0427/9946/4611/files/zetivaxonuv.pdf
    • https://cdn.shopify.com/s/files/1/0435/0679/4656/files/mubesazajosexijibuw.pdf
    • https://cdn.shopify.com/s/files/1/0429/0206/1215/files/7220731382.pdf
    • https://cdn.shopify.com/s/files/1/0431/3497/6157/files/83108299682.pdf
    • https://cdn.shopify.com/s/files/1/0437/3184/5271/files/maps_yeah_yeah_yeahs.pdf
    • https://cdn.shopify.com/s/files/1/0446/7815/2345/files/corpus_linguistics_introduction.pdf
    • https://cdn.shopify.com/s/files/1/0433/9829/9813/files/seganijusosidevepujares.pdf
    • https://cdn.shopify.com/s/files/1/0447/7632/5286/files/10021946683.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vixegenosevisime.pdf
    • https://cdn.shopify.com/s/files/1/0431/4179/1895/files/gebidanot.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007cbd.bin
d86b07aaed934a7652ae5eeef45bfa96947aa77b80d6bba6db62a4559a04bd06
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CBD 5020 bytes
font_01_sfnt_off00008dbd.bin
8de56d5f478275936f988d371fa7e58c1b02ad4183704bdd34a665b936d5ca9e
pdf-font-stream PDF embedded font (sfnt) at offset 0x8DBD 13240 bytes
font_02_sfnt_off0000b7a4.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0xB7A4 4324 bytes