Malicious PDF — malware analysis report

Static analysis result for SHA-256 9681c7c347218426…

MALICIOUS

PDF

49.3 KB Created: 2020-08-30 00:24:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e527c10a5fa1f2426a21e54183f5d640 SHA-1: 2a631ab9b444328a8e09fa0120f336d9b38eda29 SHA-256: 9681c7c34721842676d00f2591811432c0892c39896ad1356b5cb8be1c664809
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded URLs, many of which point to a link farm hosted on cdn.shopify.com. One of these URLs, 'https://ttraff.me/wix?keyword=the+way+things+work', is identified as a known malicious redirector. This suggests the document's primary purpose is to lure users to malicious sites through a network of links.

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/wix?keyword=the+way+things+work
    • https://static.usrfiles.com/ugd/b8c837_3462070560c4448b9b6904571638a6a0.pdf
    • https://static.usrfiles.com/ugd/de3d83_24b03680a806465f9793d60cbbcee922.pdf
    • https://static.usrfiles.com/ugd/b8c837_c45b466862d24e3e9a3067ae7ffe2457.pdf
    • https://static.usrfiles.com/ugd/b8c837_d68c6f48aa114e01934e7c0366e1c7f3.pdf
    • https://static.usrfiles.com/ugd/b8c837_eb4fea33ec3547b69151513ee97c5c2e.pdf
    • https://cdn.shopify.com/s/files/1/0434/0069/1862/files/6404939360.pdf
    • https://cdn.shopify.com/s/files/1/0440/2829/7381/files/crying_cat_meme_hearts.pdf
    • https://cdn.shopify.com/s/files/1/0437/0392/6938/files/sewipifofurari.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/15009206429.pdf
    • https://cdn.shopify.com/s/files/1/0429/2768/5798/files/88032256665.pdf
    • https://cdn.shopify.com/s/files/1/0434/4430/6086/files/tal_botvinnik.pdf
    • https://cdn.shopify.com/s/files/1/0431/8606/1463/files/lagu_bowo_caping_gunung.pdf
    • https://cdn.shopify.com/s/files/1/0436/3422/9398/files/kitumidenudifimiro.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/76102764406.pdf
    • https://cdn.shopify.com/s/files/1/0436/1519/1202/files/ocr_biology_a_level_specification.pdf
    • https://cdn.shopify.com/s/files/1/0436/1850/0765/files/negro_national_anthem_lyrics.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_off000075b3.bin
05b5daf7e2f66dd82ba52b551c33949d3e89a3fce4f5e35bb0bdaf0761cee994
pdf-font-stream PDF embedded font (sfnt) at offset 0x75B3 5124 bytes
font_01_sfnt_off00008736.bin
f50be67272af3d00b48fa7a62c6c47a168a2c4d058927262871efc2828b17ced
pdf-font-stream PDF embedded font (sfnt) at offset 0x8736 17912 bytes