Malicious PDF — malware analysis report

Static analysis result for SHA-256 04fd87adedab69fb…

MALICIOUS

PDF

46.4 KB Created: 2020-08-31 07:54:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 127c51214503c7ad5b93f31ff30811cd SHA-1: dd8a4f69297f9e6501c8a36b92be29e8020fccc2 SHA-256: 04fd87adedab69fb3ae615b8752874ba1432cf63dcdbb777412d367401055683
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which point to a redirector service. The primary malicious URL identified is https://ttraff.cc/wix?keyword=nombres+de+libros+de+ginecologia+y+obstetricia, which is flagged as malicious. The document's structure and the presence of numerous external links suggest an attempt to direct users to potentially harmful content, likely for phishing or malware distribution.

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=nombres+de+libros+de+ginecologia+y+obstetricia
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_bc902adb3b6844d4bca6e174d3780f15.pdf
    • https://static.usrfiles.com/ugd/217d68_e3ad2c1398254fe281d059c0b8aec0e3.pdf
    • https://static.usrfiles.com/ugd/e2f7e1_79b8c102bdf34302a4d6c5fb8915ecfc.pdf
    • https://static.usrfiles.com/ugd/5ecadc_b2df9de9701f4cb58714e514d08ad68d.pdf
    • https://static.usrfiles.com/ugd/1f2646_be6e7adbf9714b2aadfd180ef6d35b22.pdf
    • https://static.usrfiles.com/ugd/5de1df_3453a2b443454015be085112c5a54922.pdf
    • https://static.usrfiles.com/ugd/aff7ca_efac8ed8f4d241298c4da618258feca8.pdf
    • https://static.usrfiles.com/ugd/b8c837_9fe9365e3ed445ee9fedfd7e3e68843e.pdf
    • https://static.usrfiles.com/ugd/493135_07496c845f014770a162837579e97470.pdf
    • https://static.usrfiles.com/ugd/b8c837_73359e61e4a94844bd878dd3e39c833a.pdf
    • https://static.usrfiles.com/ugd/455f95_f718cccd9be24b1b86869739fad1cad9.pdf
    • https://static.usrfiles.com/ugd/a64c8c_0bdbf0057de749bf8c2096905f348fb3.pdf
    • https://static.usrfiles.com/ugd/7ff653_b961961e317c43edb95a4588c827b115.pdf
    • https://static.usrfiles.com/ugd/09c3c7_f1347a130b60488193383c0ec0f32118.pdf
    • https://static.usrfiles.com/ugd/0dd040_093ea24b7bd54bad9fa0508d1643b899.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_off000072d7.bin
de3bc375ce7b6486d352274f70832126b896552f99cfe38379a4229a7deec34d
pdf-font-stream PDF embedded font (sfnt) at offset 0x72D7 5472 bytes
font_01_sfnt_off00008555.bin
484458729b01164c990584c73c4f218b45e8485f0a03b30e337d76f1ecf004e8
pdf-font-stream PDF embedded font (sfnt) at offset 0x8555 11488 bytes