Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eeb2850e29d9460…

MALICIOUS

PDF

47.4 KB Created: 2020-09-09 13:40:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bef4ebf1646cd2b2fd744c7533c832f2 SHA-1: 07aff5e9b6ce555a6edec84ea615fc1eb0bdd4d5 SHA-256: 0eeb2850e29d94601fd4cf55b341c5e3387798bef40f7988e708ba1b97cca208
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL, which is flagged as malicious. It also hosts a large number of external PDF links, many of which are benign but contribute to a link farm. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure related to song audio. No scripts were extracted, but the presence of a malicious redirector suggests an attempt to lead the user to a harmful destination.

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.me/pify?keyword=ammadi+ammadi+song+audio
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/0464/9884/files/6324224681.pdf
    • https://cdn.shopify.com/s/files/1/0428/9983/2995/files/48630737490.pdf
    • https://cdn.shopify.com/s/files/1/0428/6827/7404/files/amplitude_modulation_using_simulink.pdf
    • https://cdn.shopify.com/s/files/1/0431/1888/7068/files/48032933037.pdf
    • https://cdn.shopify.com/s/files/1/0435/8311/1325/files/belkin_netcam_hd_app.pdf
    • https://cdn.shopify.com/s/files/1/0435/2904/4119/files/96715570993.pdf
    • https://cdn.shopify.com/s/files/1/0430/9018/2297/files/80158152077.pdf
    • https://cdn.shopify.com/s/files/1/0432/7381/4182/files/zisisekonisutog.pdf
    • https://cdn.shopify.com/s/files/1/0433/7837/6853/files/budget_2020_19_pakistan_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0431/6997/2392/files/adjustviewbounds_android_studio.pdf
    • https://cdn.shopify.com/s/files/1/0438/0780/1504/files/23791284890.pdf
    • https://static.usrfiles.com/ugd/0f1814_ab23d33167794e82b0b65dec1aaaf7e2.pdf
    • https://static.usrfiles.com/ugd/b8c837_21cc0cae5a5d426ca3d9d6962460034b.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066a4.bin
6a7881c035ae41fc8bae33ed741d9e2ce6c09bfee3c2a0bbdfa4a94f416695b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66A4 5004 bytes
font_01_sfnt_off00007796.bin
fb090a94d23b529d7bdc57e3d654433b0adc1b613d8a22098582bc2513de1b38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7796 10540 bytes
font_02_sfnt_off00009bd6.bin
e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BD6 16164 bytes

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