Malicious PDF — malware analysis report

Static analysis result for SHA-256 f72786dd0fc435fe…

MALICIOUS

PDF

56.1 KB Created: 2020-08-17 09:43:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed655f7c19b84e9c4049f9d9d3b45b7b SHA-1: e3c9cb72679241b4710c5761bc553e8c06200d91 SHA-256: f72786dd0fc435fe188c8cf73b3373f2f03d9f1d089e5de753062ba6b04113fe
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one pointing to a known malicious redirector. The document body, though partially corrupted, includes text related to a report and the malicious URL, suggesting a lure for phishing or malware delivery. The presence of a link farm heuristic further indicates a malicious intent to distribute links.

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.com/pify?keyword=the+hillsborough+stadium+disaster+inquiry+final+report
    • http://files.susefarms.com/uploads/1/3/1/3/131398540/bimobelo.pdf
    • http://files.priorecologylab.com/uploads/1/3/0/8/130813511/67bcbebf39be145.pdf
    • http://files.executiveinformationsystems.net/uploads/1/3/0/8/130814856/gudepidalubejanezire.pdf
    • https://cdn.shopify.com/s/files/1/0429/7680/5018/files/29353845133.pdf
    • https://cdn.shopify.com/s/files/1/0432/2977/3979/files/sizarekiwisarefumavosan.pdf
    • https://cdn.shopify.com/s/files/1/0435/3274/6906/files/bolowogekukinusuxigibike.pdf
    • https://cdn.shopify.com/s/files/1/0431/2465/4241/files/tuwuna.pdf
    • https://cdn.shopify.com/s/files/1/0432/1479/9012/files/81147005948.pdf
    • https://cdn.shopify.com/s/files/1/0434/2526/7877/files/50_sombras_mas_oscuras_descargar.pdf
    • https://cdn.shopify.com/s/files/1/0430/2385/9873/files/minecraft_pc_xbox_controller.pdf
    • https://cdn.shopify.com/s/files/1/0434/6871/8233/files/antrenmanlarla_matematik_1_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/7346/1669/files/boot_camp_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0431/7344/5792/files/67740459595.pdf
    • https://cdn.shopify.com/s/files/1/0435/8501/1880/files/nanusavosururabemewajev.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_off00009d50.bin
b78fe7babd6d55725cb21c22b820f9b9cdfff2da9b74644de14254d7a3d58c00
pdf-font-stream PDF embedded font (sfnt) at offset 0x9D50 5772 bytes
font_01_sfnt_off0000b0c3.bin
9872e84cc5d8a654d7ab7672a41566816dbbe2585cf17e60f23aa0b62f6c9540
pdf-font-stream PDF embedded font (sfnt) at offset 0xB0C3 10240 bytes