Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c00c44c874a0f51…

MALICIOUS

PDF

40.6 KB Created: 2020-09-03 16:11:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04bdcde02f2de93c74e965004ed36e4b SHA-1: 3b2b5528d5c00b4d1c54fc9e7f5e39a5e08fa839 SHA-256: 8c00c44c874a0f518538e1f747bbb16e6c3688b7b8a215eceb4fa0c139e346d6
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass of external links, including one pointing to a known malicious redirector at 'https://ttraff.me/pify?keyword=activex++mac+free'. This suggests the document is designed to lure users to malicious sites under the guise of offering 'Activex mac free'. The ML classifier also strongly indicated maliciousness.

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.me/pify?keyword=activex++mac+free
    • https://cdn.shopify.com/s/files/1/0435/0024/1061/files/63375640658.pdf
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/66392408884.pdf
    • https://cdn.shopify.com/s/files/1/0429/9898/8954/files/jogun.pdf
    • https://cdn.shopify.com/s/files/1/0433/7238/0310/files/avery_label_format_5195.pdf
    • https://static.usrfiles.com/ugd/b8c837_bf71010f633e4f8f9dcf5413e4d7993d.pdf
    • https://static.usrfiles.com/ugd/95089d_fc8523551ef9470a865d67b6dd26243a.pdf
    • https://static.usrfiles.com/ugd/7041e4_d53772c5458a4b318a3f5f7a4c7b631d.pdf
    • https://static.usrfiles.com/ugd/451a43_4743fd35113d488da564177e35512b1d.pdf
    • https://static.usrfiles.com/ugd/b8c837_c79c3b56b2d8456cb416a272aa5cb81e.pdf
    • https://static.usrfiles.com/ugd/a31856_4dbfba7c54844f318e2f8095fc4bd098.pdf
    • https://static.usrfiles.com/ugd/aff7ca_b31e126e896643fe80482755f219e768.pdf
    • https://cdn.shopify.com/s/files/1/0461/4455/3123/files/19087565020.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/55439617710.pdf
    • https://cdn.shopify.com/s/files/1/0431/2317/9677/files/tigolis.pdf
    • https://cdn.shopify.com/s/files/1/0446/9473/2953/files/centroids_of_composite_figures_example_problems.pdf
    • https://cdn.shopify.com/s/files/1/0428/0143/0695/files/98881566528.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_off0000625c.bin
b724e54e6f73159e2602969d0e0875e0d28c5fa5c1424464bc478a5cf10b9201		 pdf-font-stream PDF embedded font (sfnt) at offset 0x625C 4932 bytes
font_01_sfnt_off0000731a.bin
df728414badde939f115af1837f869242c8897cde3233a3729e94fd368f33727		 pdf-font-stream PDF embedded font (sfnt) at offset 0x731A 10152 bytes

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