Malicious PDF — malware analysis report

Static analysis result for SHA-256 24e6edf140fe244b…

MALICIOUS

PDF

55.7 KB Created: 2020-08-09 18:00:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10e62c48bd8905c1282eb82131ec0558 SHA-1: 6976a8ed57a43e48403798298b31f673eabddac6 SHA-256: 24e6edf140fe244baac0c9d56b76aa74129e0106f611eb52a02d7291ac3a8f13
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one identified as a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting a link farm designed to distribute malicious content or engage in SEO poisoning. The ML classifier strongly supports the malicious verdict. No scripts were extracted, but the primary attack vector appears to be the redirection to malicious URLs.

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=pre+islamic+arabia+pdf
    • http://zuled.whitelakeholidayresort.com/uploads/1/3/1/1/131164250/4697247.pdf
    • http://files.demsofnorthmeck.org/uploads/1/3/0/8/130813768/rutibuzabilapeb-mikewezebalewo-podab-rasimaxevud.pdf
    • http://files.neschoolofperformingarts.org/uploads/1/3/0/7/130739780/d574ae51.pdf
    • http://files.wastelessjewelryandcompany.com/uploads/1/3/0/9/130969408/9094262.pdf
    • https://cdn.shopify.com/s/files/1/0428/0346/2303/files/92306962026.pdf
    • https://cdn.shopify.com/s/files/1/0438/9748/7512/files/degesijenanopepifuxonuda.pdf
    • https://cdn.shopify.com/s/files/1/0429/1844/5223/files/jivuravomoni.pdf
    • https://cdn.shopify.com/s/files/1/0427/4572/5094/files/wedomasaxozavevutu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2775/1321/files/12444818110.pdf
    • https://cdn.shopify.com/s/files/1/0434/0639/3496/files/rizodulozezuw.pdf
    • https://cdn.shopify.com/s/files/1/0441/0654/7352/files/wowaxosopeli.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/26965864763.pdf
    • https://cdn.shopify.com/s/files/1/0432/7407/6315/files/bcom_1st_year_books_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5082/6905/files/irc_college_books.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_off00009d96.bin
cc0cdcfb7f4ba6ae43cdd620453860fc9581e1d997fbe16c4a9764944ecf4352
pdf-font-stream PDF embedded font (sfnt) at offset 0x9D96 5444 bytes
font_01_sfnt_off0000affe.bin
185a5c0de514c311286a4c17e44bca17ccbe674c9236850056f2d14b85fc6f2c
pdf-font-stream PDF embedded font (sfnt) at offset 0xAFFE 9956 bytes