Malicious PDF — malware analysis report

Static analysis result for SHA-256 c95f982e0b9d27c0…

MALICIOUS

PDF

49.5 KB Created: 2020-08-25 01:47:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac78b18443090cb3588559c1092fec0b SHA-1: c4a273b396431c20442e70a5659563a2db448ac4 SHA-256: c95f982e0b9d27c02560d9cbe7491ff25513fcc645b2866e0c851e2a9d482878
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to an 'internet booster app' and the malicious URL. This suggests a social engineering lure to trick users into visiting a malicious site. No scripts were extracted, and the PDF structure itself is the primary vector.

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=best+internet+booster+app+for+android+phone
    • http://files.mimicross.com/uploads/1/3/2/6/132682630/2820353.pdf
    • http://files.regalimagegermanshepherds.com/uploads/1/3/0/7/130775490/f8df9.pdf
    • http://zamematir.tintawitaelderliving.com/uploads/1/3/0/8/130874038/8938673.pdf
    • http://files.whiskingoutsidethebox.com/uploads/1/3/0/9/130969427/c7cd350.pdf
    • https://cdn.shopify.com/s/files/1/0432/5238/3904/files/57231355925.pdf
    • https://cdn.shopify.com/s/files/1/0432/4186/5384/files/48873193101.pdf
    • https://cdn.shopify.com/s/files/1/0432/4252/0739/files/sarifod.pdf
    • https://cdn.shopify.com/s/files/1/0461/9691/6374/files/81460172387.pdf
    • https://cdn.shopify.com/s/files/1/0431/4149/6981/files/the_startup_owner_s_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/3456/5025/files/nuzamuvutameguso.pdf
    • https://cdn.shopify.com/s/files/1/0437/8004/6997/files/47914025210.pdf
    • https://cdn.shopify.com/s/files/1/0428/1742/1479/files/65748634029.pdf
    • https://cdn.shopify.com/s/files/1/0429/7395/4204/files/93679726000.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zilifevuzumojewod.pdf
    • https://cdn.shopify.com/s/files/1/0462/6812/1237/files/google_sheets_send_email_on_edit.pdf
    • https://cdn.shopify.com/s/files/1/0430/9994/7162/files/ycmou_admission_form.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000083fa.bin
0c5082ac097a57fdf9aa734f286f05f8971dd03ea52d33b7cc67f7072de7bf9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83FA 5288 bytes
font_01_sfnt_off000095df.bin
3f76e37208ddbc811cecafb72e30c18ed3aca1f8cc0233967547c392ab326293		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95DF 10204 bytes

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