Malicious PDF — malware analysis report

Static analysis result for SHA-256 79dc4f1713930f4d…

MALICIOUS

PDF

221.0 KB Created: 2020-08-06 10:30:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1b44afc27dd7a1598dabe8fe31f611a SHA-1: f5e744356a17f14292a297bc842665937369f70b SHA-256: 79dc4f1713930f4dcbd0d4dd6c25cc55eb8e60ea3955a0dc4a33741769213cb2
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a heuristic match for advance-fee scam lures and a critical alert for a malicious redirector link. The embedded URL, https://ttraff.ru/pify?keyword=best+definition+of+artificial+intelligence+pdf, is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL, suggesting the primary purpose is to trick the user into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.ru/pify?keyword=best+definition+of+artificial+intelligence+pdf
    • http://roriso.huskybands.com/uploads/1/3/0/8/130874330/menafumemulox.pdf
    • http://files.progressotech.com/uploads/1/3/0/8/130814423/0b9b8d3aa.pdf
    • http://files.zenmethodphilly.com/uploads/1/3/0/8/130873810/e54cdcee7cdb5.pdf
    • http://files.cookwithjames.com/uploads/1/3/0/7/130739340/8638391.pdf
    • http://files.laziboycarwash.com/uploads/1/3/1/4/131483149/b7c7fa46.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/1663/2992/files/leon_plus_anesthesia_machine.pdf
    • https://cdn.shopify.com/s/files/1/0428/5592/3878/files/how_to_torrent_without_isp_knowing.pdf
    • https://cdn.shopify.com/s/files/1/0433/5976/4634/files/harry_chapin_taxi_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0434/5344/8358/files/64005535631.pdf
    • https://cdn.shopify.com/s/files/1/0431/0849/9618/files/97943327079.pdf
    • https://cdn.shopify.com/s/files/1/0433/5963/3559/files/bimepufufuvakebivilis.pdf
    • https://cdn.shopify.com/s/files/1/0429/2778/4095/files/no_reply_at_all.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8179/files/feziw.pdf
    • https://cdn.shopify.com/s/files/1/0430/2536/7194/files/95838408783.pdf
    • https://cdn.shopify.com/s/files/1/0433/0576/2974/files/disademibupaleg.pdf
    • https://cdn.shopify.com/s/files/1/0430/7946/7170/files/litelogawow.pdf
    • https://cdn.shopify.com/s/files/1/0435/7508/3167/files/shake_it_off_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0430/8716/7645/files/jutuguf.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00031430.bin
2afea478da8ab4b2518723b5b513920eac1d8206ea640eb7dbf9d8685678349d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x31430 6828 bytes
font_01_sfnt_off00032b4d.bin
a143196748d4b3469113d2255c3611a6e15823c4d9d838b2b7aa1bbc97675191		 pdf-font-stream PDF embedded font (sfnt) at offset 0x32B4D 5372 bytes
font_02_sfnt_off00033da7.bin
9080788e697aa10785b880f5deee2e1cec7f215e3de6b9608199a92a68a1c302		 pdf-font-stream PDF embedded font (sfnt) at offset 0x33DA7 11400 bytes

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