Malicious PDF — malware analysis report

Static analysis result for SHA-256 110196a524fa04d9…

MALICIOUS

PDF

41.4 KB Created: 2020-08-31 14:49:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b132049ed533f7223e14aa8867a19906 SHA-1: 6ec059e9fc4384d213f746ddbdf78830332c31a9 SHA-256: 110196a524fa04d93c098e0d9a1560bbf5edc3e74b4c9c32028368effbfb9ac8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits characteristics of a link farm, embedding numerous URLs that point to external resources. One critical heuristic identified a link to known malicious redirector infrastructure, suggesting an attempt to lure users to harmful sites. The document body, though partially corrupted, contains text related to an 'android app' and a URL, reinforcing the malicious redirection intent. The presence of a large number of external PDF links further supports the link farm classification.

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.me/wix?keyword=best+blemish+remover+android+app
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/90c678_58f802d28ddc4f7ab95c99eab665ad64.pdf
    • https://static.usrfiles.com/ugd/fef806_381d9cd4530040aeacc96c3b1fc600d4.pdf
    • https://static.usrfiles.com/ugd/f4de5e_39e0d91eb24a4e5b8c70d6e707c2da2e.pdf
    • https://static.usrfiles.com/ugd/b8c837_354a95618d324d27ae6063bcd34cfe0b.pdf
    • https://cdn.shopify.com/s/files/1/0435/1492/1112/files/bubibakadopizowitifes.pdf
    • https://cdn.shopify.com/s/files/1/0432/6758/8252/files/72309046853.pdf
    • https://cdn.shopify.com/s/files/1/0436/7450/1285/files/bhole_baba_ki_photo_karna_hai.pdf
    • https://static.usrfiles.com/ugd/1f2646_442eaec4d1ae42faa26c3935ef026594.pdf
    • https://static.usrfiles.com/ugd/a8ca0f_277c9c66a47d40f2b6de643bb2788679.pdf
    • https://static.usrfiles.com/ugd/5360f8_a9a1e27b718547f9bcd3c56ec2c4f7d1.pdf
    • https://static.usrfiles.com/ugd/704566_a5af13b511dd49129fcd64d82b86a304.pdf
    • https://static.usrfiles.com/ugd/5a1791_9210141b89e6470d9df58dead0243e01.pdf
    • https://static.usrfiles.com/ugd/b8c837_56832bff5e0b4c5982dfa82bff44cd28.pdf
    • https://static.usrfiles.com/ugd/b8c837_9babca9598b14045ad3889e6a2fec3ae.pdf
    • https://static.usrfiles.com/ugd/57c819_5a0e746482564851970e81833d2a8510.pdf
    • https://static.usrfiles.com/ugd/b8c837_43692c2d4ef04a4b87c6244a3a50b39d.pdf
    • https://static.usrfiles.com/ugd/36f25b_4b2c40b324dd4bce9661a6c3341ba44d.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064a3.bin
a57659f1f58f89cb2cbf9baa5ab9b5c5462f1bc2433440d3bb6c51de3c95ae6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64A3 5448 bytes
font_01_sfnt_off000076fd.bin
c671dad6fd3c1cf4ac782b1ce42058136b6572bca8bb7471831dad9c9941b18d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76FD 9872 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.