Malicious PDF — malware analysis report

Static analysis result for SHA-256 71df88bb68be9bfd…

MALICIOUS

PDF

39.8 KB Created: 2020-08-18 16:27:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6dae76a83e31df1359f15da4abaacb1f SHA-1: eb0c717c75d98ec4a1d26311fce282b5fd619042 SHA-256: 71df88bb68be9bfd0fff000cf5decd2bd5b36d9c02c3980f215d248beaeaa0dd
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=agad+bam+nagada+song'. This URL, along with a large number of other embedded links to PDF files, suggests a link farm or redirection scheme designed to lure users to malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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=agad+bam+nagada+song
    • http://files.stillpointatbeckside.com/uploads/1/3/2/8/132815183/kaxoriwonavakidu.pdf
    • http://sigefozaw.jackandjeffdenimco.com/uploads/1/3/1/4/131438379/4640945.pdf
    • http://vikiv.sophisticatedfit.com/uploads/1/3/1/8/131857565/a17ec6c.pdf
    • http://files.judyatraveny.com/uploads/1/3/0/9/130969472/vutuzu-guxefavomowix-gemoretisuxevo-kekoxuranu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/8644/4699/files/75282225244.pdf
    • https://cdn.shopify.com/s/files/1/0438/4754/9088/files/berceuse_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0432/4042/3592/files/fe_mechanical_review_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/4933/7507/files/bambukat_movie_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/1370/9730/files/kiwigimuxeponexalukudibod.pdf
    • https://cdn.shopify.com/s/files/1/0437/1356/0729/files/acca_f9_short_notes.pdf
    • https://cdn.shopify.com/s/files/1/0430/1658/5379/files/36422298998.pdf
    • https://cdn.shopify.com/s/files/1/0429/9541/7237/files/katevejimeb.pdf
    • https://cdn.shopify.com/s/files/1/0429/5829/1093/files/fevanepogalosemozem.pdf
    • https://cdn.shopify.com/s/files/1/0429/3846/6460/files/anemia_ferropenica_en_embarazo.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d52.bin
57fbd4e6066c265d26729e1878052ecacac0d5f621ecae43054404d16dcdb1f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D52 5148 bytes
font_01_sfnt_off00006ec5.bin
0036ef95024be6bb5837e911890f2b29f1b3cb8296ef7d44730966603e230062		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EC5 14248 bytes

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