Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c8cb649a9019850…

MALICIOUS

PDF

53.3 KB Created: 2020-08-08 22:31:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f56411e61246a4580a65658634c65cac SHA-1: cc63e6f44ccc46f419f06805ae3fa80d01a1ddf6 SHA-256: 7c8cb649a9019850022e69a9e8ccd977a4067f9e8cb0d2082547769d1066701b
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many of which point to a link farm hosted on Shopify, but one critical link redirects to known malicious infrastructure. The document body, though heavily obfuscated, contains the text 'Public relations strategies and tactics pdf free' and the malicious URL, suggesting a lure to download malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=public+relations+strategies+and+tactics+pdf+free
    • http://files.willowbycommunityleague.com/uploads/1/3/2/6/132681426/7b401f74.pdf
    • http://xovud.royaleliterental.com/uploads/1/3/0/9/130969352/visezudagozola_lemadekufukilat_gufela_lerifibuzu.pdf
    • http://files.lyndonstatesga.com/uploads/1/3/1/0/131071067/ribune_tunop.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/7219/2669/files/articles_with_geographical_names_test.pdf
    • https://cdn.shopify.com/s/files/1/0431/8851/9080/files/rufilafutazadobabikawuvat.pdf
    • https://cdn.shopify.com/s/files/1/0440/0994/7301/files/butevegidoruzasaze.pdf
    • https://cdn.shopify.com/s/files/1/0429/4865/7318/files/napetevisonuluxenifuf.pdf
    • https://cdn.shopify.com/s/files/1/0435/8239/0431/files/porufalelavugozuj.pdf
    • https://cdn.shopify.com/s/files/1/0430/0088/9507/files/raromekezugagovobig.pdf
    • https://cdn.shopify.com/s/files/1/0437/6595/6759/files/century_battery_charger.pdf
    • https://cdn.shopify.com/s/files/1/0438/0976/7584/files/13596396993.pdf
    • https://cdn.shopify.com/s/files/1/0430/9699/8048/files/wirizadudusizarekese.pdf
    • https://cdn.shopify.com/s/files/1/0433/8122/7672/files/xokotonufolurafepi.pdf
    • https://cdn.shopify.com/s/files/1/0430/4486/4149/files/55619438079.pdf
    • https://cdn.shopify.com/s/files/1/0433/3089/6026/files/jutedowebekupimavaruzona.pdf
    • https://cdn.shopify.com/s/files/1/0434/1301/2641/files/81807602158.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000084e2.bin
3758e5a37045f33c8574b618fb5ba92a8c34f73bca1b846ed86474ca8ac90ae5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84E2 5344 bytes
font_01_sfnt_off00009708.bin
f5aa7be6ac05203c92b620d76550c11b65e1a1bb86a85abe6311e25ef6637750		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9708 10240 bytes
font_02_sfnt_off0000b9f4.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB9F4 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.