Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d57cd6c8c4e357e…

MALICIOUS

PDF

46.3 KB Created: 2020-09-03 08:58:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac35dd3b8db90da2ed1d76354180fe5c SHA-1: 6e1c73069b969b4c7849cc293476f6456f33726c SHA-256: 3d57cd6c8c4e357ee9dcc34cb9a7cac901e95565c4ead2d035048a561f51dd50
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/wix?keyword=good+morning+photos+hd+2018++free'. This URL is presented in a way that suggests a lure for users searching for images, likely to lead them to malicious content or phishing pages. The PDF also contains a mass external PDF link farm, indicating a potential SEO poisoning or link-building tactic. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.com/wix?keyword=good+morning+photos+hd+2018++free
    • https://cdn.shopify.com/s/files/1/0437/9063/1064/files/acca_financial_reporting_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/9633/4753/files/73282013353.pdf
    • https://cdn.shopify.com/s/files/1/0436/5189/1358/files/magazine_file_box_label_template.pdf
    • https://cdn.shopify.com/s/files/1/0436/6126/3001/files/18671897576.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/83834067276.pdf
    • https://cdn.shopify.com/s/files/1/0428/4389/8019/files/varicose_veins_physiotherapy_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0440/0729/3086/files/15099040517.pdf
    • https://cdn.shopify.com/s/files/1/0434/9244/2264/files/losokiwi.pdf
    • https://static.usrfiles.com/ugd/97aff7_797ae53f6e3941f8b68efdd51946c915.pdf
    • https://static.usrfiles.com/ugd/0047a4_d63b7888c0da456fa6ba22e4254dc9bb.pdf
    • https://static.usrfiles.com/ugd/f95141_0c18be30fa79453986c43974e98a7d14.pdf
    • https://static.usrfiles.com/ugd/b8c837_f123701d040f4e1290fc6ee77226c2f6.pdf
    • https://static.usrfiles.com/ugd/0a0016_43cdaf5233bf4ec6b297d519947c9284.pdf
    • https://cdn.shopify.com/s/files/1/0433/7909/7758/files/56044510441.pdf
    • https://cdn.shopify.com/s/files/1/0433/0287/9387/files/stars_crash_course_astronomy_26_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0618/8955/files/ready_player_one_book_free.pdf
    • https://cdn.shopify.com/s/files/1/0465/0663/9512/files/41396455729.pdf
    • https://cdn.shopify.com/s/files/1/0436/6735/7846/files/wilojovox.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006df5.bin
0980ae15cff6596985fe424b69773eadb07f61cb5f79428d9b5e6a84cfb5bdfc
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF5 5764 bytes
font_01_sfnt_off00008178.bin
e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
pdf-font-stream PDF embedded font (sfnt) at offset 0x8178 1800 bytes
font_02_sfnt_off00008a05.bin
507978971f6eff5ae23f8f5cd239a653ab5d0bc421b44db106d80f02f6118643
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A05 9960 bytes