Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0e1aa30de28974c…

MALICIOUS

PDF

45.7 KB Created: 2020-07-29 05:16:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1dc31593d6e1bab2ab933928467546b8 SHA-1: 60b973a065572df72ac8588667621a0919a6f557 SHA-256: c0e1aa30de28974c0e532dfaa29b75656df0612434ef024244117cbfde11e77e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'facebook messenger video pc', suggesting a lure for users to click on these links. The ML classifier strongly indicated maliciousness, and the presence of a link farm further supports a malicious intent to redirect users to potentially harmful sites.

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/pify?keyword=facebook+messenger+video+pc
    • http://files.stupedhillbilly.com/uploads/1/3/0/7/130740573/mipod_riwafabikebuto.pdf
    • http://files.meetzgrooming.com/uploads/1/3/1/3/131398246/1c3f09.pdf
    • http://files.gabrielmpena.com/uploads/1/3/0/7/130775084/2224859.pdf
    • http://files.tommytritone.com/uploads/1/3/1/4/131406758/duvavoxop.pdf
    • https://cdn.shopify.com/s/files/1/0433/0681/1560/files/kukuzavikovemojige.pdf
    • https://cdn.shopify.com/s/files/1/0430/3169/1421/files/17716268548.pdf
    • https://cdn.shopify.com/s/files/1/0429/7300/3939/files/desumabog.pdf
    • https://cdn.shopify.com/s/files/1/0431/7406/8390/files/88443920006.pdf
    • https://cdn.shopify.com/s/files/1/0435/7783/5681/files/57180575876.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/1301656487.pdf
    • https://cdn.shopify.com/s/files/1/0428/4484/8295/files/65610276147.pdf
    • https://cdn.shopify.com/s/files/1/0432/7214/3001/files/55666821104.pdf
    • https://cdn.shopify.com/s/files/1/0440/7623/6950/files/gigemuxikoloforuvefuxipa.pdf
    • https://cdn.shopify.com/s/files/1/0428/8220/3801/files/wukikakefeduzateroga.pdf
    • https://cdn.shopify.com/s/files/1/0427/9291/1007/files/zutegubiwo.pdf
    • https://cdn.shopify.com/s/files/1/0435/7105/2707/files/99978623592.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_off00007396.bin
5813491394ef3253e74596ece9aee9da5f40c45a3d0ddf7a783c6a102fafab72
pdf-font-stream PDF embedded font (sfnt) at offset 0x7396 5288 bytes
font_01_sfnt_off0000856c.bin
1b26e7f30cdda7cb732d4140bdf93f2661c9799725fafc9775eb2ce8773db21c
pdf-font-stream PDF embedded font (sfnt) at offset 0x856C 10496 bytes