Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1c02082d29f1199…

MALICIOUS

PDF

48.4 KB Created: 2020-08-12 10:53:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98e70593e8776ff04e11ff58de0bcb2e SHA-1: 73377321d3321adada09ac4c05acd58ed2ddb488 SHA-256: e1c02082d29f11997feecfe336769a3963e9ef17961994ce129f512ca004981c
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, specifically pointing to 'https://ttraff.cc/pify?keyword=management+accounting+terms+pdf'. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs, many of which are hosted on Shopify but also include other unknown domains. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be social engineering, luring the user to click the malicious link under the guise of accessing a PDF document.

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=management+accounting+terms+pdf
    • http://bazoxojiw.jessiebeefit.com.au/uploads/1/3/2/8/132815045/81438230a9f6.pdf
    • http://fusax.badlyscattered.com/uploads/1/3/0/8/130814328/tudaxasewu.pdf
    • http://files.kwikwashlaundromat.com/uploads/1/3/0/8/130873914/3976347.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/12_hole_chromatic_harmonica_lessons.pdf
    • https://cdn.shopify.com/s/files/1/0429/8198/2361/files/biology_class_9_chapter_1.pdf
    • https://cdn.shopify.com/s/files/1/0433/7752/4888/files/3910_ford_tractor.pdf
    • https://cdn.shopify.com/s/files/1/0433/3459/8809/files/ceidg_1_wersja_1._8._8.pdf
    • https://cdn.shopify.com/s/files/1/0431/6299/2795/files/96978973616.pdf
    • https://cdn.shopify.com/s/files/1/0428/0310/1863/files/cardiorenal_syndrome.pdf
    • https://cdn.shopify.com/s/files/1/0440/6883/1382/files/seguridad_alimentaria_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0432/7515/7670/files/98059048403.pdf
    • https://cdn.shopify.com/s/files/1/0427/9664/6556/files/android_secret_codes.pdf
    • https://cdn.shopify.com/s/files/1/0433/6343/4654/files/tamizaje_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0434/6976/6821/files/88950616166.pdf
    • https://cdn.shopify.com/s/files/1/0431/8455/4135/files/15373168674.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_off00006e53.bin
97308c7146f0e37ca3f204a912ff7f07695d39f1381de67d21be9236ccbfa5f2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E53 5448 bytes
font_01_sfnt_off000080b9.bin
58b4873d33ac9fffaf45ed1a2312b8eb5fadf3b067e77f8cfe9e87095f6a7717
pdf-font-stream PDF embedded font (sfnt) at offset 0x80B9 6068 bytes
font_02_sfnt_off0000906a.bin
feb762ca975b28593c3bd7351e92b1fb9045c00428e6097483680630d93e3c77
pdf-font-stream PDF embedded font (sfnt) at offset 0x906A 10460 bytes