Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b8cd8291bb14b1a…

MALICIOUS

PDF

41.7 KB Created: 2020-08-11 18:45:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a92d22813f1898490512e1d0bbb348a9 SHA-1: d99474f39c71093d709d1a03abf9ec00850d22bc SHA-256: 1b8cd8291bb14b1a8b39715ffd22fb600a73d27dde1036dcf7a60531cb7feb25
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary malicious redirector URL identified as https://ttraff.cc/wb?keyword=nueva%20reforma%20laboral%202018%20mexico%20pdf. This indicates a phishing or scam attempt designed to lure users to malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF.

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/wb?keyword=nueva%20reforma%20laboral%202018%20mexico%20pdf
    • http://files.megan-livingston.com/uploads/1/3/0/7/130739288/lumaro_geseru_videnubetuz.pdf
    • http://files.colinmooresculpture.com/uploads/1/3/2/7/132710592/moduzegirotewu_sofinimoruve.pdf
    • http://files.chelseamwest.com/uploads/1/3/1/3/131380601/9d4f8d04d274933.pdf
    • http://nejotot.lavernesartpotfolio.com/uploads/1/3/2/7/132740478/senijuseronalegu.pdf
    • https://cdn.shopify.com/s/files/1/0437/5222/6974/files/85019995124.pdf
    • https://cdn.shopify.com/s/files/1/0428/5156/5724/files/24023114377.pdf
    • https://cdn.shopify.com/s/files/1/0435/9805/3535/files/82898618841.pdf
    • https://cdn.shopify.com/s/files/1/0432/0840/9250/files/team_extreme_minecrasft.pdf
    • https://cdn.shopify.com/s/files/1/0432/4756/7010/files/download_yasin_dan_tahlil_lengkap.pdf
    • https://cdn.shopify.com/s/files/1/0438/4597/6221/files/repusop.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/42479515564.pdf
    • https://cdn.shopify.com/s/files/1/0435/3887/4532/files/curtis_air_compressor_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/7817/9221/files/automatic_control_systems_raven.pdf
    • https://cdn.shopify.com/s/files/1/0434/4433/8838/files/bevopalupiguvenam.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_off000060d6.bin
e06c837655a19b15959294fa5bdae9a9b747b295fe44de951bdb48489457734a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60D6 5880 bytes
font_01_sfnt_off000074d9.bin
aee27ebff2ccbc2eddcf42b9a2b38023152c6ec716762a7e331bef07f5e98d31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74D9 10956 bytes

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