Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3725c709a9a1074…

MALICIOUS

PDF

47.7 KB Created: 2020-08-29 03:31:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da90b2461bfb1dbff41354b3786d9847 SHA-1: 4d3566f5bab09a13fa46695b5455fc0462a3038b SHA-256: d3725c709a9a1074f18e1d05c40468a4148edb1184f11668407338ee5b521fe7
152 Risk Score

Malware Insights

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

The PDF contains a link farm designed to mimic search results, specifically for MP3 downloads. The primary malicious link, 'https://ttraff.cc/wix?keyword=yabanc%25C4%25B1+%25C5%259Fark%25C4%25B1+mp3+indirme+sitesi', is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other benign-looking PDF links, suggesting a social engineering tactic to drive traffic to malicious sites.

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=yabanc%25C4%25B1+%25C5%259Fark%25C4%25B1+mp3+indirme+sitesi
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kijajakunij.pdf
    • https://cdn.shopify.com/s/files/1/0432/7306/0520/files/rental_agreement_template_uk.pdf
    • https://cdn.shopify.com/s/files/1/0430/4535/5674/files/business_plan_restaurant_example.pdf
    • https://cdn.shopify.com/s/files/1/0434/8900/1638/files/sql_basic_interview_questions.pdf
    • https://cdn.shopify.com/s/files/1/0430/6495/0946/files/45872783077.pdf
    • https://static.usrfiles.com/ugd/b8c837_768799232fe64d4eb1ea42bf39b28721.pdf
    • https://static.usrfiles.com/ugd/b8c837_f584a96f647146bcb54b0fdf69334f3e.pdf
    • https://static.usrfiles.com/ugd/b8c837_bc0c4db397c340528d5172c59936b4ea.pdf
    • https://static.usrfiles.com/ugd/b8c837_1e244c619ba3435db45c11b591767a90.pdf
    • https://static.usrfiles.com/ugd/b8c837_685bba00e4ab4db9b3a08a512e85b923.pdf
    • https://static.usrfiles.com/ugd/b8c837_5b978cba329c4ad791d0f43ec05f9913.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_off00006431.bin
c4c8794095fe62cee0e84392573e74be955b7310a3c9834ab7e7eefea19e3816
pdf-font-stream PDF embedded font (sfnt) at offset 0x6431 5472 bytes
font_01_sfnt_off00007626.bin
28e76f1577143095fb4b50208f9b5d97d56ec1d245147188cb77d8cc2f4cd09e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7626 14516 bytes
font_02_sfnt_off0000a1b9.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0xA1B9 4324 bytes