Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec78528502d597fe…

MALICIOUS

PDF

49.4 KB Created: 2020-08-31 01:31:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd9c92bb85842bdcf2dd47aed930ba0b SHA-1: 24858585b16570744088c0f62896cc16e4a532ec SHA-256: ec78528502d597feefd64ae2a6204f99e065d3c731489b82d640f9e5c09557f6
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many pointing to Shopify domains, suggesting an SEO poisoning or link farm strategy. One critical heuristic indicates a direct link to a known malicious redirector at 'https://ttraff.cc/wix?keyword=laxmi+suktam+in+hindi+pdf'. The document body, though heavily obfuscated, contains the same URL and a reference to 'laxmi suktam in hindi pdf', indicating a lure to disguise the malicious intent. The ML classifier strongly flagged this PDF as malicious.

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/wix?keyword=laxmi+suktam+in+hindi+pdf
    • https://cdn.shopify.com/s/files/1/0432/4101/3412/files/23669522523.pdf
    • https://cdn.shopify.com/s/files/1/0434/8903/4402/files/cassandra_architecture.pdf
    • https://cdn.shopify.com/s/files/1/0437/3767/7989/files/darowimuvitavi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xibirinadinabamagumib.pdf
    • https://cdn.shopify.com/s/files/1/0429/5376/9123/files/kozumuvisuno.pdf
    • https://cdn.shopify.com/s/files/1/0431/1685/5453/files/saturated_and_unsaturated_fats.pdf
    • https://cdn.shopify.com/s/files/1/0432/5077/8275/files/cd4047_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/4441/3350/files/81772593305.pdf
    • https://cdn.shopify.com/s/files/1/0430/9703/0817/files/vipomirikidonipijujiwaj.pdf
    • https://static.usrfiles.com/ugd/b8c837_bc382d467c754a869cd3d621bcb08ec2.pdf
    • https://static.usrfiles.com/ugd/b58d21_c0e6e9f41eac4c81b998b6a8d4556be2.pdf
    • https://static.usrfiles.com/ugd/b8c837_2977d4f4b08f41228e7cb93640987667.pdf
    • https://static.usrfiles.com/ugd/b8c837_f38cb052435c4fe7a7880d25155df6cc.pdf
    • https://static.usrfiles.com/ugd/d162e3_4b81976663034d6397d0033c0598cf56.pdf
    • https://cdn.shopify.com/s/files/1/0432/1676/5087/files/angle_pair_relationships_test.pdf
    • https://cdn.shopify.com/s/files/1/0431/1420/1250/files/happy_birthday_images_in_tamil.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00009df4.bin
9fdd04a62c42a94cc820a1aba6238cc9872d007e28b6cbd292b0b76ad3a4fbb2
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9DF4 7768 bytes
font_00_sfnt_off00005b2d.bin
36da08a17ee5086c89932df7127f35fb89201a4772404626b96c30481b7f78b0
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B2D 5224 bytes
font_01_sfnt_off00006cd7.bin
6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CD7 3720 bytes
font_02_sfnt_off0000783a.bin
6fe3d8a185b65603f4d053790f9c715f15be07420ea37761ef96c4bf88ba54d6
pdf-font-stream PDF embedded font (sfnt) at offset 0x783A 11088 bytes