Malicious PDF — malware analysis report

Static analysis result for SHA-256 30f01f2f71a2d952…

MALICIOUS

PDF

41.0 KB Created: 2020-08-30 02:54:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 182ba0c3501c2e91aa8c430827acf251 SHA-1: efb6424c75df5adb6c6576433e0f59f0e2c548d2 SHA-256: 30f01f2f71a2d952b772c93171e99631cdfaf60ec7b210de3e5b93658e845284
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains the same URL and appears to be a lure related to 'present continuous versus present simple pdf'. The presence of numerous external PDF links, many pointing to static.usrfiles.com, suggests a link farm or SEO poisoning tactic to increase visibility of the malicious redirector. No scripts were extracted from this sample.

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/wix?keyword=present+continuous+versus+present+simple+pdf
    • https://static.usrfiles.com/ugd/b8c837_f17c6554e1ce4a27b2ea7a8688aa29ca.pdf
    • https://static.usrfiles.com/ugd/b8c837_54b7dcf7a2be4aa09672ee1cf0f27ae1.pdf
    • https://static.usrfiles.com/ugd/7e0eb0_ee2aed480a6146279558ea70883fa806.pdf
    • https://static.usrfiles.com/ugd/912de2_25f3ad26558a4b178dfc9e46667073db.pdf
    • https://static.usrfiles.com/ugd/b8c837_906fbb18604e4936b0fe807f795e5f98.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zevuwuvufotolotatagonisex.pdf
    • https://cdn.shopify.com/s/files/1/0430/8592/2466/files/92976578398.pdf
    • https://cdn.shopify.com/s/files/1/0429/8499/7025/files/2343628535.pdf
    • https://cdn.shopify.com/s/files/1/0431/9114/0501/files/sokakuwo.pdf
    • https://static.usrfiles.com/ugd/269bb8_8daf03d1cf53460f9c3ce29e57a83491.pdf
    • https://static.usrfiles.com/ugd/b8c837_3fbf20b3a4684a5ba762c53a39b1ad9c.pdf
    • https://static.usrfiles.com/ugd/b8c837_eca3916731d74711a2ab789f96a02afb.pdf
    • https://static.usrfiles.com/ugd/a86d68_deb38400eba04ec3ad635f7940372af9.pdf
    • https://static.usrfiles.com/ugd/b65acf_7d01217ddb4e4000a0ec537142bc77c5.pdf
    • https://static.usrfiles.com/ugd/b8c837_6d2de1530d9a40f7a8d9d9c9c6652491.pdf
    • https://static.usrfiles.com/ugd/f3ecbe_bd8ad466617949979ccc67415713b3f4.pdf
    • https://static.usrfiles.com/ugd/493135_60bcf776a2b545d99b1ea16e5e80fb9f.pdf
    • https://static.usrfiles.com/ugd/b8c837_45cafd91020b4c1787eefdb7b41a8cf8.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_off00006265.bin
52679051446394330cca925332622f7db884e7930bf1080bbaeedd33af3a2499		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6265 5152 bytes
font_01_sfnt_off000073d6.bin
199327291647c2c154982bfab392a203c4038b50689fb785a60612f8c1141821		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73D6 10060 bytes

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