Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cb8614ba75dbfdf…

MALICIOUS

PDF

60.1 KB Created: 2020-08-30 02:09:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ccdaa9e7089683b1fdb8d3aeaa65500e SHA-1: 3f89c802db6818974bcb931effa908bc92de95de SHA-256: 8cb8614ba75dbfdff276fa51e2c3614b43db0c24f06ce5d298ee633dc0212894
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a mass of external links, with the primary redirector URL being https://ttraff.ru/wix?keyword=body+of+lies+hollywood+dubbed+movie. This indicates a likely SEO poisoning or phishing campaign where the document's content is designed to attract clicks to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious.

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.ru/wix?keyword=body+of+lies+hollywood+dubbed+movie
    • https://cdn.shopify.com/s/files/1/0432/3190/3902/files/kubakosixuvarutizirulewu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7002/1014/files/lekir.pdf
    • https://cdn.shopify.com/s/files/1/0429/9338/5633/files/wamojinusaziniwepurijame.pdf
    • https://cdn.shopify.com/s/files/1/0461/9400/0023/files/tixevujojemoju.pdf
    • https://cdn.shopify.com/s/files/1/0462/5619/3687/files/process_flow_charts_templates.pdf
    • https://cdn.shopify.com/s/files/1/0458/1520/1958/files/fofafukijew.pdf
    • https://cdn.shopify.com/s/files/1/0437/5642/1269/files/free_real_estate_api.pdf
    • https://cdn.shopify.com/s/files/1/0428/2001/0140/files/augusto_comte_sociologia.pdf
    • https://cdn.shopify.com/s/files/1/0427/7728/0671/files/11654446407.pdf
    • https://cdn.shopify.com/s/files/1/0430/5528/4378/files/wusoduxebaxudi.pdf
    • https://static.usrfiles.com/ugd/d2751c_8fa9e41fbeef4827b38e75fc68ef88f4.pdf
    • https://static.usrfiles.com/ugd/4ae4db_4dd86b7a20364a53a82eced13e00dfbb.pdf
    • https://static.usrfiles.com/ugd/b8c837_d20b110532c74c6eb7e66faf85c44d35.pdf
    • https://static.usrfiles.com/ugd/77eba6_2d7fb4f9a5344f75a672056da458e14d.pdf
    • https://static.usrfiles.com/ugd/b8c837_8ccba908413f4b75b4dbe3ec35274bd2.pdf
    • https://static.usrfiles.com/ugd/b8c837_2984490deefa4548872edf3be348ae19.pdf
    • https://static.usrfiles.com/ugd/b8c837_88337e4664b04b30ac83f69ffabd745e.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_off0000ad59.bin
276a04881a010f71c68237841129d49b86c8d66a3aaa79dfdacc82b8a5403a25
pdf-font-stream PDF embedded font (sfnt) at offset 0xAD59 5284 bytes
font_01_sfnt_off0000bf54.bin
29b746b65a58c75a0baaac0eb13894ba06cb3a7a09006e15dccb3cb8f797aae0
pdf-font-stream PDF embedded font (sfnt) at offset 0xBF54 10556 bytes