Malicious PDF — malware analysis report

Static analysis result for SHA-256 bae14341a4f42f81…

MALICIOUS

PDF

53.8 KB Created: 2020-08-28 01:19:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4d450095bbc6ce6acecb48217cf6bd0 SHA-1: f255474c914dff08bc41124dea2cc29896d1cf29 SHA-256: bae14341a4f42f817cfa8efa1215c0cc2a846fb545e9a0ba8fce261bc1506981
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=licensed+to+ill+zip', which is flagged as a malicious redirector. This suggests the document's primary purpose is to redirect users to malicious content or phishing 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/pify?keyword=licensed+to+ill+zip
    • http://golarew.illuminat.co/uploads/1/3/0/9/130969723/worid.pdf
    • http://files.moamsticks.com/uploads/1/3/1/0/131069934/1616053.pdf
    • https://cdn.shopify.com/s/files/1/0438/3899/6642/files/clear_acrylic_sheet_properties.pdf
    • https://cdn.shopify.com/s/files/1/0430/0577/1927/files/19590671451.pdf
    • https://cdn.shopify.com/s/files/1/0460/7891/8820/files/bijixajiguxuxoror.pdf
    • https://cdn.shopify.com/s/files/1/0437/9826/6018/files/arquitectura_gotica_en_francia.pdf
    • https://cdn.shopify.com/s/files/1/0439/9477/5710/files/acrobat_reader_free_download_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0440/0267/2798/files/80108658291.pdf
    • https://cdn.shopify.com/s/files/1/0429/9302/5183/files/gesij.pdf
    • https://cdn.shopify.com/s/files/1/0430/3588/5725/files/29593486035.pdf
    • https://cdn.shopify.com/s/files/1/0428/9137/8854/files/megunobunimofabun.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51220099535.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_off00008984.bin
36cf383402f5ab36ee4b81a50b0e30a54f8a82876a196a07a797230ad03b1418
pdf-font-stream PDF embedded font (sfnt) at offset 0x8984 4540 bytes
font_01_sfnt_off00009905.bin
93179d1b2a735b1663fd83d1ccec8bdc9a12d036372903437d10d1670cd1ecc2
pdf-font-stream PDF embedded font (sfnt) at offset 0x9905 10436 bytes
font_02_sfnt_off0000bcb9.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
pdf-font-stream PDF embedded font (sfnt) at offset 0xBCB9 4324 bytes