Malicious PDF — malware analysis report

Static analysis result for SHA-256 252d4627fa42b488…

MALICIOUS

PDF

241.1 KB Created: 2020-08-14 09:18:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dbd507eca2a3ff77668418f364273d5e SHA-1: 14ad2e5d446278c3bb5af9dd9aefe858b53bbaab SHA-256: 252d4627fa42b488fa2e5ecb45ee83685a3cfe250e544a473ce51b0a7839b02e
94 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 'https://ttraff.com/pify?keyword=chunking+division+worksheets+without+remainders'. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, contains the same URL, indicating the primary intent is to lure the user to this malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=chunking+division+worksheets+without+remainders
    • http://files.northwestbreedingservices.com/uploads/1/3/1/4/131454523/54e0cbf8e4.pdf
    • http://files.lodgeprestwick1060.com/uploads/1/3/1/3/131380871/jirakuzufiros.pdf
    • http://files.interiorwellbeing.com/uploads/1/3/1/1/131164386/eb7fcb5638834.pdf
    • http://files.tuxpeoplesmusic.com/uploads/1/3/0/8/130873715/5048689.pdf
    • https://cdn.shopify.com/s/files/1/0430/0180/7007/files/imperialisme_di_asia_tenggara.pdf
    • https://cdn.shopify.com/s/files/1/0432/4281/5643/files/bose_wave_radio_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/3957/1611/files/34826931806.pdf
    • https://cdn.shopify.com/s/files/1/0435/7311/7096/files/historia_de_las_asambleas_de_dios_en_mexico.pdf
    • https://cdn.shopify.com/s/files/1/0431/3264/9636/files/tawoju.pdf
    • https://cdn.shopify.com/s/files/1/0437/1926/2363/files/tau_paint_schemes.pdf
    • https://cdn.shopify.com/s/files/1/0427/7701/8524/files/logibugozep.pdf
    • https://cdn.shopify.com/s/files/1/0428/1666/7815/files/73907492180.pdf
    • https://cdn.shopify.com/s/files/1/0448/3887/9392/files/rigunuwetap.pdf
    • https://cdn.shopify.com/s/files/1/0435/0846/5828/files/ginobu.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/instant_root_apk.pdf
    • https://cdn.shopify.com/s/files/1/0434/0357/5454/files/98585366778.pdf
    • https://cdn.shopify.com/s/files/1/0428/6975/1967/files/lafewiborewidevet.pdf
    • https://cdn.shopify.com/s/files/1/0430/7664/9124/files/xikarutivumosesuketu.pdf
    • https://cdn.shopify.com/s/files/1/0444/1961/2839/files/83155009820.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_off00035c43.bin
895e9700b42af4fd14ed2b1a57dad3a3f3764aa990e9d3be9367d9fd076a1739
pdf-font-stream PDF embedded font (sfnt) at offset 0x35C43 5328 bytes
font_01_sfnt_off00036e40.bin
5ffb4071ba7d88c208a269851f2cd87a303ef3ab5da834cec65dcbf40f8fc3df
pdf-font-stream PDF embedded font (sfnt) at offset 0x36E40 15540 bytes
font_02_sfnt_off00039f14.bin
6c90aeed2532b98c0a186b08cf03f887eef891cfcf73d45db200a88e759eb4dd
pdf-font-stream PDF embedded font (sfnt) at offset 0x39F14 16488 bytes