Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a3cc0a61f009561…

MALICIOUS

PDF

58.2 KB Created: 2020-08-31 14:51:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2b737c3e05102675f9da86d32a577eda SHA-1: b47b03872093b83fad0f9985dcdda530ef037759 SHA-256: 2a3cc0a61f009561da1ff903e709074c1894b44731a7b7d1e137ae4830e9dd0a
154 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL, suggesting it is used to lure users into clicking through to potentially malicious content. The ML classifier also strongly indicated maliciousness.

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.com/wix?keyword=sahih+al+bukhari+arabic+pdf+free
    • https://static.usrfiles.com/ugd/b8c837_d4ffcaa7ded843768f2e4d80aa351a0d.pdf
    • https://static.usrfiles.com/ugd/b8c837_180bab1df0fc4d8e9ea8f9ab08d461e7.pdf
    • https://static.usrfiles.com/ugd/b8c837_3747a899bcf04340a272ee1d411db89a.pdf
    • https://static.usrfiles.com/ugd/e643da_2e7bdb1e3be54b8ab57b225f5ba73cef.pdf
    • https://static.usrfiles.com/ugd/d1c05f_50079a1ecf8f4e28a7036276460e2b40.pdf
    • https://cdn.shopify.com/s/files/1/0430/3667/2162/files/baby_bestiary_5e_beast_companion.pdf
    • https://cdn.shopify.com/s/files/1/0430/8015/5289/files/walamezuditex.pdf
    • https://cdn.shopify.com/s/files/1/0435/5502/9141/files/ofsted_report_cockburn_high_school_leeds.pdf
    • https://static.usrfiles.com/ugd/b8c837_f09ee20ddcb847f99ea77f51b776e095.pdf
    • https://static.usrfiles.com/ugd/b9801a_c45eba0b4c0c4bfab549adfa930152b7.pdf
    • https://static.usrfiles.com/ugd/429b25_09bdf8be490d4e258be2549bae4dfbf3.pdf
    • https://static.usrfiles.com/ugd/2486b5_a6de30692d214cf6abdda89118298db8.pdf
    • https://static.usrfiles.com/ugd/b8c837_dbeaf4717e1744a3a8260b2a47c49374.pdf
    • https://static.usrfiles.com/ugd/de60da_ee86c4df916e4ca183363a74a8423e30.pdf
    • https://static.usrfiles.com/ugd/b8c837_afee9af970f54e318101ba4a7c456c42.pdf
    • https://static.usrfiles.com/ugd/0dd040_a06d9475504442c68523b21af3509c16.pdf
    • https://static.usrfiles.com/ugd/3aca14_2f14eddbd34e47b0afbd7069101298ea.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_off000096d9.bin
e1015c29402c418d4b5b10e06c67724ecfaf95a03b272738367a720ab7837079
pdf-font-stream PDF embedded font (sfnt) at offset 0x96D9 5372 bytes
font_01_sfnt_off0000a911.bin
b799e46073a6af44d635f597dfa8dbbbfdb282314390d5d9131decb7cc242ebf
pdf-font-stream PDF embedded font (sfnt) at offset 0xA911 16776 bytes