Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaddf48d69d6c243…

MALICIOUS

PDF

39.8 KB Created: 2020-08-04 21:02:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ccfeb38f8382fe40778873ba392099a1 SHA-1: 0a474afe350d7e296d9e6bd7f20998763ff0dfac SHA-256: eaddf48d69d6c24332c94637314af8a40afb5047fd68bce129b9fc35f3480fe9
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link redirects to a known malicious infrastructure at ttraff.cc. This indicates a social engineering attempt to drive traffic to malicious sites, likely for further exploitation or phishing. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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.
  • 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.cc/pify?keyword=effective+javascript+herman+pdf
    • http://files.michelleswafford.com/uploads/1/3/1/3/131380341/mamesim-modilax.pdf
    • http://files.katesclosetconsignment.com/uploads/1/3/0/7/130739376/b1869b40fd.pdf
    • http://files.exoticaquaticsboulder.com/uploads/1/3/0/8/130873983/dilowubigoxijig.pdf
    • http://files.sawfishonline.com/uploads/1/3/1/4/131406391/deginut.pdf
    • https://cdn.shopify.com/s/files/1/0440/4789/2630/files/acceptance_sampling_lecture_notes.pdf
    • https://cdn.shopify.com/s/files/1/0430/8038/4674/files/54986265052.pdf
    • https://cdn.shopify.com/s/files/1/0435/6725/1617/files/41212627360.pdf
    • https://cdn.shopify.com/s/files/1/0437/5943/5928/files/1907448712.pdf
    • https://cdn.shopify.com/s/files/1/0428/9685/1111/files/kindle_daily_deals.pdf
    • https://cdn.shopify.com/s/files/1/0427/4136/6951/files/vetol.pdf
    • https://cdn.shopify.com/s/files/1/0431/6394/3067/files/bejufiniravodowagigoran.pdf
    • https://cdn.shopify.com/s/files/1/0434/8284/1250/files/twinkle_twinkle_little_star_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0438/6878/2757/files/tufodomojejejigekij.pdf
    • https://cdn.shopify.com/s/files/1/0433/6658/0382/files/30258425439.pdf
    • https://cdn.shopify.com/s/files/1/0451/0511/9397/files/trane_xl80_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/2790/6206/files/jakabufe.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_off00005c8f.bin
b4566580ce79fd1c59a52d2ca6224ec2a4961fdc2ae58dccabb96ebbbbcb212e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C8F 5456 bytes
font_01_sfnt_off00006f05.bin
17b8d7289d6cb8413a7a7aaedcc8faba0edd6dcf3bffd7082137d6b29b1ace30
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F05 10340 bytes