Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8a58f558a4a96b7…

MALICIOUS

PDF

64.8 KB Created: 2020-08-31 03:07:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ac5b7c8baf13914972141eadaeef549 SHA-1: fda53e2ffe0c39204fe0086a7a045783a10466e8 SHA-256: f8a58f558a4a96b7603980d5a6f7d6649a3831daf393c31279581151266c6b2c
154 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 of which point to a link farm designed to drive traffic to a malicious redirector. The document body, though heavily obfuscated, contains text related to downloading a movie, suggesting a lure to trick users into clicking the malicious links. The primary malicious URL identified is ttraff.ru, which is flagged as a known malicious redirector.

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.ru/wix?keyword=l%2527+avare+louis+de+funes+telecharger+gratuit
    • https://cdn.shopify.com/s/files/1/0432/5716/8027/files/4256201114.pdf
    • https://cdn.shopify.com/s/files/1/0431/5696/3479/files/64545740748.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3847/files/one_missed_call_movie_in_tamilrockers.pdf
    • https://static.usrfiles.com/ugd/b8c837_2bfbce9e99b9418aa57e31d4dbabc5c6.pdf
    • https://static.usrfiles.com/ugd/e8506d_af60c29f3ee641c08f3e508b82233c6b.pdf
    • https://static.usrfiles.com/ugd/66c878_e7f1b818447c48c797e625ba846c0734.pdf
    • https://static.usrfiles.com/ugd/f967ac_99fd6e6bee2b4f9982ecb886fc9de0d2.pdf
    • https://cdn.shopify.com/s/files/1/0429/1212/0998/files/dejitonadinugukavira.pdf
    • https://cdn.shopify.com/s/files/1/0433/0392/7973/files/48600658978.pdf
    • https://cdn.shopify.com/s/files/1/0432/8521/7436/files/fortinet_nse4_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/3043/6247/files/86365838973.pdf
    • https://cdn.shopify.com/s/files/1/0428/0667/3574/files/design_of_machinery_norton_5th_download.pdf
    • https://static.usrfiles.com/ugd/b8c837_07afa77f3e634e66b134aafe6a3cc6c7.pdf
    • https://static.usrfiles.com/ugd/b8c837_dff7c2f01dfb49fc867614780af3b1a9.pdf
    • https://static.usrfiles.com/ugd/1fbf8b_c46cde21364846b89bc9ff44b1bb6046.pdf
    • https://static.usrfiles.com/ugd/b8c837_1f7deda28ff6422481ffdd6e65b38894.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000080e1.bin
4b502177d5b9acfcaf7a44819a07f4c4989429f4bbb5af4084b491435f9183d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80E1 5316 bytes
font_01_sfnt_off000092fd.bin
374e1bc11049e2750aa53ff29b446c0e843747e6ee03840a29de6d159c99b266		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92FD 2316 bytes
font_02_sfnt_off00009ce4.bin
da583b61f52d9ecab234188058d97b026a45eec15b45267a4106f981064243b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CE4 5092 bytes
font_03_sfnt_off0000aefc.bin
6de6b26f4471b72810cc7a0a09c8890c6d6f495dff79da9817bd8cc7eaec768b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAEFC 16376 bytes
font_04_sfnt_off0000dff0.bin
89498c5ae7adc0dcab6b62eb765d682c9ffdf1ab0127780e1186b0b00e602b38		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF0 16112 bytes

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