Malicious PDF — malware analysis report

Static analysis result for SHA-256 d346323f41624879…

MALICIOUS

PDF

56.6 KB Created: 2020-08-30 05:12:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24fa8ab2a82cc025c356c6134ad114e0 SHA-1: 41d9eef19d13f790195efe71f414c8852129348d SHA-256: d346323f416248794013a2bc893e42279b12ff35fb7ca16f69de688fa5e54f18
154 Risk Score

Malware Insights

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

The PDF contains a link disguised as a recipe, which redirects to a known malicious domain (ttraff.cc). This indicates a social engineering attempt to trick users into visiting a potentially harmful site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, and the document body was heavily obfuscated, but the presence of the malicious redirector link is a high-confidence indicator of malicious intent.

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.cc/wix?keyword=simple+cracker+dip+recipes
    • https://static.usrfiles.com/ugd/cbdbb6_c1ff9a13ae74486b88a48edca2e4c0d0.pdf
    • https://static.usrfiles.com/ugd/8cbfce_99a2ae9e64c1435ea2acf7ed110faaef.pdf
    • https://static.usrfiles.com/ugd/8b2c09_44afb05ff0f249a2859e121c63f0833f.pdf
    • https://static.usrfiles.com/ugd/b8c837_1a080ea90e7643849987ba25e7c634b6.pdf
    • https://cdn.shopify.com/s/files/1/0431/4628/1122/files/busybox_android_zip.pdf
    • https://cdn.shopify.com/s/files/1/0433/8044/1238/files/wugoj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/20675343362.pdf
    • https://cdn.shopify.com/s/files/1/0428/8688/9639/files/xulufiweke.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/88714063886.pdf
    • https://cdn.shopify.com/s/files/1/0436/9612/8153/files/nujajozub.pdf
    • https://cdn.shopify.com/s/files/1/0431/2412/9953/files/hilti_re_500_v3_data_sheet.pdf
    • https://static.usrfiles.com/ugd/b8c837_6797cc100474482bbaf7bc7ea767e960.pdf
    • https://static.usrfiles.com/ugd/df4650_07b503b52d9e44ed90282f2241d123da.pdf
    • https://static.usrfiles.com/ugd/98e298_c9cd167c686940e79a537a8cda37b44a.pdf
    • https://static.usrfiles.com/ugd/a1fb72_b5bfde6c493b41ef8245b97cfe50c0b3.pdf
    • https://static.usrfiles.com/ugd/b8c837_21f6cabfffad41a5b9899de05f52b16f.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069d9.bin
07ba6036030b5369963740e186a6c3b7d06418d8cc64129b1ebb823c8f3c25fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69D9 4880 bytes
font_01_sfnt_off00007a4f.bin
0858dcb55e231da587b6f8d00eb76f73fe7aa6abd973152d37efbebee656d7ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A4F 5072 bytes
font_02_sfnt_off00008c9e.bin
c1e8f791c17b50b1f720ca268219320f2b8ab301c5e8dcb7f54b2f82ecc1691c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C9E 10180 bytes
font_03_sfnt_off0000afb2.bin
975089639afea594160f6daa1ae948ffc4125994d61a9fd32dce02580f7b6b15		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAFB2 16312 bytes
font_04_sfnt_off0000c53d.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC53D 4324 bytes

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