Malicious PDF — malware analysis report

Static analysis result for SHA-256 58a48fc93faee3fd…

MALICIOUS

PDF

36.1 KB Created: 2020-08-24 15:58:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: edad03ae2b8bea9ec2cb9b18717b07b4 SHA-1: ad0e753362510214acff27cf52931d24368c8cb1 SHA-256: 58a48fc93faee3fd06074186da6dee3e2ee511fc0f5c596d5b7d9665fb3d7768
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=accident+report+bureau+albany+ny'. The document body, though heavily obfuscated, also contains this URL, suggesting a lure to trick users into clicking on a malicious link. The ML classifier strongly supports the malicious nature of this PDF.

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/pify?keyword=accident+report+bureau+albany+ny
    • http://tabobisoj.kevinzollman.com/uploads/1/3/1/6/131636665/bevunovavafaf.pdf
    • http://tagak.cowichandoula.com/uploads/1/3/0/7/130739967/69e0e42adad9.pdf
    • https://cdn.shopify.com/s/files/1/0430/4663/3621/files/fupisuzalemovudel.pdf
    • https://cdn.shopify.com/s/files/1/0434/7022/5574/files/freiwillige_brgschaft_mietvertrag.pdf
    • https://cdn.shopify.com/s/files/1/0437/7034/7677/files/9468589655.pdf
    • https://cdn.shopify.com/s/files/1/0435/5594/6647/files/87173366037.pdf
    • https://cdn.shopify.com/s/files/1/0459/5423/6575/files/kirks_wine_bar_broadsheet.pdf
    • https://cdn.shopify.com/s/files/1/0438/7376/3496/files/berichtsheft_vorlage_wchentlich.pdf
    • https://cdn.shopify.com/s/files/1/0432/8315/3056/files/cerfa_13750_3_remplissable.pdf
    • https://cdn.shopify.com/s/files/1/0435/4513/3207/files/football_manager_2019_digital_mac.pdf
    • https://cdn.shopify.com/s/files/1/0428/0074/2567/files/fexazuxamobidomaz.pdf
    • https://cdn.shopify.com/s/files/1/0438/6832/4005/files/lutilatovejakovivi.pdf
    • https://cdn.shopify.com/s/files/1/0427/4988/6620/files/deficiencia_da_vitamina_b12.pdf
    • https://cdn.shopify.com/s/files/1/0428/8780/7129/files/493563894.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_off00004f3c.bin
ade80e6168f01900824e41f7f3215980b8255caf685ad6e0b65afe614dae6049
pdf-font-stream PDF embedded font (sfnt) at offset 0x4F3C 5120 bytes
font_01_sfnt_off000060a8.bin
5bc1ef8c792147395c236c8f4edfca47a8e6ed1f8cecbfa8b95ba0dfb4a48543
pdf-font-stream PDF embedded font (sfnt) at offset 0x60A8 10400 bytes