Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6ea98b3af5d4d91…

MALICIOUS

PDF

40.8 KB Created: 2020-09-21 17:47:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cec13c13864005064a6969593b3243b6 SHA-1: 7653c3ddeaddf44c9243862a9f6e52a84ffaaf76 SHA-256: b6ea98b3af5d4d919782762348ca0c1dae8cf3a8d35257ffb1f2f970db44debc
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches one of the extracted IOCs. The presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious content through deceptive 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.me/wix?keyword=does+slim+ambition+keto+work
    • http://jirak.pensionplanningsolutions.com/uploads/1/3/1/4/131409508/8e77eb348.pdf
    • http://files.westfielddentalpa.com/uploads/1/3/0/7/130775942/bavef_kezujuwusuk_javexolizepun.pdf
    • http://dibij.essence-into-form.com/uploads/1/3/0/7/130739343/vokagogomubijixez.pdf
    • http://pivuk.neowwc.com/uploads/1/3/1/8/131856698/zapemuzebora_betir_kikem_difeko.pdf
    • https://cdn.shopify.com/s/files/1/0432/4130/8319/files/pointers_in_c.pdf
    • https://cdn.shopify.com/s/files/1/0430/7160/2855/files/54960633270.pdf
    • https://cdn.shopify.com/s/files/1/0435/5430/8257/files/giant_steps_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/5280/0929/files/armor_of_god_bible_study_for_adults.pdf
    • https://cdn.shopify.com/s/files/1/0446/1743/3251/files/samsung_bloatware_list.pdf
    • https://cdn.shopify.com/s/files/1/0434/3123/1655/files/download_infinite_flight_simulator_apk.pdf
    • https://cdn.shopify.com/s/files/1/0434/0688/5027/files/92926828340.pdf
    • https://cdn.shopify.com/s/files/1/0435/8311/1323/files/wajubakegajisorasajupako.pdf
    • https://cdn.shopify.com/s/files/1/0431/5856/9128/files/4640654233.pdf
    • https://cdn.shopify.com/s/files/1/0437/8044/0213/files/midon.pdf
    • https://cdn.shopify.com/s/files/1/0429/8617/6665/files/better_call_saul_wikipedia_episode_guide.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_off000061b3.bin
1e75b0c0181ab97252fbfbe7160f519b3a86c86065bd8a27ab83714a37464c07
pdf-font-stream PDF embedded font (sfnt) at offset 0x61B3 5128 bytes
font_01_sfnt_off0000731e.bin
8dd2c2afd86dd5530772a674a538b9086aca9121a51d49ac1855f0e748839c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x731E 10352 bytes