Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffb9d5b62850bc20…

MALICIOUS

PDF

42.9 KB Created: 2020-08-30 09:00:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 370101eb7c918655775d2750c0c3f39b SHA-1: 21faed483adef5670a1c8b3630831ae2d967653c SHA-256: ffb9d5b62850bc20301734f727bee084293084134bae63fb9a1e86dd97f21525
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The document body, though obfuscated, includes the target URL and a product name, likely as a lure. The presence of a large number of external links suggests a link farm or SEO poisoning tactic to increase visibility. No scripts were extracted, but the primary malicious action is the redirection to the malicious URL.

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.link/wix?keyword=bosch+maxx+5+speed+perfect
    • https://static.usrfiles.com/ugd/3cb679_7f944e20419e47f3ab451eb8587220d5.pdf
    • https://static.usrfiles.com/ugd/cafc24_5b944f48b73a4152a590bd8752ae7d42.pdf
    • https://static.usrfiles.com/ugd/b8c837_e00a3a6dbe5044e19e79717ded6e2396.pdf
    • https://static.usrfiles.com/ugd/24853a_b2176d5e651443a198f22a957348f0ad.pdf
    • https://static.usrfiles.com/ugd/c63dba_f5e26fca427d43ff9aeb08e18e9b3780.pdf
    • https://cdn.shopify.com/s/files/1/0434/9224/5666/files/samsung_a70_android_10_ne_zaman_gelecek.pdf
    • https://cdn.shopify.com/s/files/1/0430/6056/0021/files/zesapasegozigudexe.pdf
    • https://cdn.shopify.com/s/files/1/0435/4277/3914/files/basic_acoustic_guitar_chords_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0429/8450/5498/files/13817809361.pdf
    • https://static.usrfiles.com/ugd/33a16d_a53bcb93217441e38053e4055a41227e.pdf
    • https://static.usrfiles.com/ugd/b8c837_73f68333ff6645ce9e90e81db893bbea.pdf
    • https://static.usrfiles.com/ugd/822ecd_7db81d32dd15478ab300a99fb3862656.pdf
    • https://static.usrfiles.com/ugd/2f8cea_386e9968da374f9eb6648c2d693e16e2.pdf
    • https://static.usrfiles.com/ugd/80c1db_e4c9e816184142d4b0bbea98709ed792.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_off00005f9f.bin
680e04214aa1ac07df7413edad22127067fa10328606901ba5c36bbf9e7fb36a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F9F 5604 bytes
font_01_sfnt_off00007284.bin
928093d357521bab2cecfb86047fd2416b6bc6f432281cd398461b7f8fc45b0d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7284 14208 bytes