Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7d524c7e25ab73f…

MALICIOUS

PDF

43.6 KB Created: 2020-08-15 02:48:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b71de2099453b658a2af76dd69cb8d65 SHA-1: 74033427401211300e3aa64faf2148f2e3bbbaec SHA-256: e7d524c7e25ab73f43e480f8871c2c970d41d20026ea2a8a4147024a6771774b
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass of external links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=calibri+light+font+family+free', which is also flagged as a malicious redirector. This suggests the document's primary purpose is to redirect users to malicious sites, likely for phishing or malware distribution.

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=calibri+light+font+family+free
    • http://fefegi.harvestmoonfallfestival.com/uploads/1/3/2/6/132681352/7a371c770b.pdf
    • http://files.iamsterp.com/uploads/1/3/1/6/131607467/fotap_zalideba.pdf
    • http://files.empowerptandwellness.com/uploads/1/3/2/3/132302716/5917608.pdf
    • https://cdn.shopify.com/s/files/1/0430/0580/4698/files/5777975167.pdf
    • https://cdn.shopify.com/s/files/1/0429/6186/2810/files/58905934353.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/changeling_the_lost_2nd_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/9993/9235/files/graphic_organizers_for_reading_comprehension_high_school.pdf
    • https://cdn.shopify.com/s/files/1/0432/5598/8374/files/24647513013.pdf
    • https://cdn.shopify.com/s/files/1/0428/7270/1095/files/kali_linux_tutorial_sinhala.pdf
    • https://cdn.shopify.com/s/files/1/0434/7514/0761/files/bacterias_aerobias_y_anaerobias.pdf
    • https://cdn.shopify.com/s/files/1/0432/7876/2139/files/8569549760.pdf
    • https://cdn.shopify.com/s/files/1/0434/0904/7708/files/brahma_purana_in_kannada.pdf
    • https://cdn.shopify.com/s/files/1/0431/7013/6218/files/starsight_brandon_sanderson_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/1717/3152/files/tunalowonolitejez.pdf
    • https://cdn.shopify.com/s/files/1/0437/7139/6257/files/dowivevovularipad.pdf
    • https://cdn.shopify.com/s/files/1/0431/6522/1028/files/risabejidek.pdf
    • https://cdn.shopify.com/s/files/1/0433/6438/4927/files/silokisame.pdf
    • https://cdn.shopify.com/s/files/1/0431/9795/6256/files/vukexunef.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_off000051c4.bin
21aea8342d8a21d06377c2c4367286e4b46a028968164db2b12c151ce7137daf
pdf-font-stream PDF embedded font (sfnt) at offset 0x51C4 5152 bytes
font_01_sfnt_off00006328.bin
3108d8a64dd4a948f8b2676ebadccd6de4bbf19e0a8f65fdfbd16c0709d21018
pdf-font-stream PDF embedded font (sfnt) at offset 0x6328 12836 bytes
font_02_sfnt_off00008c2b.bin
fb27248ec02d804caa0ce6a8dd06a8f0f211157336bc50f6c382585ff5fe3da3
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C2B 16084 bytes