Malicious PDF — malware analysis report

Static analysis result for SHA-256 7de63f75c2bad03d…

MALICIOUS

PDF

40.2 KB Created: 2020-08-30 16:57:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 276c26143abaa855a8c920fcbdfcb623 SHA-1: 3882d5c2c2270a421a46273a43ad6e4b92aa1f0e SHA-256: 7de63f75c2bad03d371c1994288bf6757e4a03639d2a4bf421e68c6a40bd083b
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.link, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains the text "The surge weapon proficiency" and the malicious URL, suggesting a lure. The PDF also contains a large number of external links, many pointing to Shopify domains, which is characteristic of SEO link farms used to distribute malicious content.

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=the+surge+weapon+proficiency
    • https://static.usrfiles.com/ugd/9374a7_cff315a70125463c8f3f3d24bdf873f2.pdf
    • https://static.usrfiles.com/ugd/b8c837_66c935be0495496383634af673ad8756.pdf
    • https://static.usrfiles.com/ugd/b8c837_ca621cc79bbc45b9801cfab84cb53875.pdf
    • https://static.usrfiles.com/ugd/f4de5e_010cbe1608fe4b96a460701d9699302e.pdf
    • https://static.usrfiles.com/ugd/1f5cef_4b7717d11d8242a3b5d1753112dc8390.pdf
    • https://cdn.shopify.com/s/files/1/0440/3937/2965/files/15999607656.pdf
    • https://cdn.shopify.com/s/files/1/0433/2870/0571/files/worshipping_false_gods_arun_shourie_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/4227/5485/files/83520983173.pdf
    • https://cdn.shopify.com/s/files/1/0459/8684/0743/files/skyrim_load_order_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/8604/4572/files/little_miss_muffet_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0428/8725/0087/files/watch_goal_2_movie_online_free.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_off00005f40.bin
dfa91884c8016baacaabe80f924f1a4a9c1250464d36e0e31b09f2492638c7d3
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F40 5388 bytes
font_01_sfnt_off000071a6.bin
b42b69d2710e9ba6b3b2d6a619d08c44eb27c5c845704260139afe20848e15dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x71A6 10152 bytes