Malicious PDF — malware analysis report

Static analysis result for SHA-256 59f393cdd4004cfe…

MALICIOUS

PDF

39.9 KB Created: 2020-08-24 10:57:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9a3fcb2343af78c67b887c9035eff2e SHA-1: 472298fa4741a2b71e42e3917c454cd32c76e752 SHA-256: 59f393cdd4004cfe6d5ed846ce67ddeeafacf52bdf0da073f7baf72e0a21321f
152 Risk Score

Malware Insights

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

The PDF file contains a link disguised as 'Advanced excel tutorials pdf' that redirects to malicious infrastructure via ttraff.cc. This indicates a phishing or social engineering attack aimed at tricking users into visiting a malicious site. The ML classifier strongly flagged this PDF as malicious, and multiple heuristics confirm the presence of malicious redirector links and a link farm.

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/pify?keyword=advanced+excel+tutorials+pdf
    • http://xovobos.ahavabotanicals.com/uploads/1/3/0/7/130776321/tekorevenup.pdf
    • https://cdn.shopify.com/s/files/1/0430/5806/9655/files/73891044952.pdf
    • https://cdn.shopify.com/s/files/1/0432/0827/8171/files/boliluvegivonurovo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37263727017.pdf
    • https://cdn.shopify.com/s/files/1/0435/0948/1624/files/gufepujumudepel.pdf
    • https://cdn.shopify.com/s/files/1/0433/4164/3928/files/wepabuvazujebopufopexo.pdf
    • https://cdn.shopify.com/s/files/1/0428/2214/0063/files/56011474577.pdf
    • https://cdn.shopify.com/s/files/1/0430/9463/8749/files/luwodetunajozo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8517/6736/files/20634034843.pdf
    • https://cdn.shopify.com/s/files/1/0430/6649/1042/files/kefone.pdf
    • https://cdn.shopify.com/s/files/1/0428/3164/2780/files/kefuvewuradozepegoli.pdf
    • https://cdn.shopify.com/s/files/1/0435/6295/9006/files/sunumunise.pdf
    • https://cdn.shopify.com/s/files/1/0429/9502/4025/files/jegasik.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_off00005dff.bin
181ea9aa1df9109c369c0872f32ecdc96f315d1564c55fde1dbc03d0ca61cbb4
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DFF 5268 bytes
font_01_sfnt_off00007005.bin
b3ddcac523f672785707026a03ec4e20652263eac6cb919dbe45690419bfb09c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7005 10276 bytes