Malicious PDF — malware analysis report

Static analysis result for SHA-256 070fe949f7abcc9a…

MALICIOUS

PDF

40.6 KB Created: 2020-09-01 21:22:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 879cd2d32d4fa364ee4f61252cd70a48 SHA-1: ce84390a40499382a0ccf593b34d5b75244b0370 SHA-256: 070fe949f7abcc9a841893403149c1c4429302527ff5310fc6da51fc5f52d6da
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'free dreamscene software for windows 7' and the malicious URL, suggesting a lure for users to download potentially harmful software. The ML classifier also strongly indicated maliciousness.

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=free++dreamscene+software+for+windows+7
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_986247ee4390497b8bc33b25eace979e.pdf
    • https://static.usrfiles.com/ugd/353d00_3ce095a07b644a59a0a7f6e1ddf98de3.pdf
    • https://static.usrfiles.com/ugd/f6a907_6cbf2588cf6443e89a28e54027a3b344.pdf
    • https://static.usrfiles.com/ugd/5360f8_82d195f12637466a86619a8746bf1c2a.pdf
    • https://static.usrfiles.com/ugd/6cf392_957772af4e3f4a73a6e1c221e0917357.pdf
    • https://static.usrfiles.com/ugd/07e02c_f3fecae4f15847d0881dbca3de1842f0.pdf
    • https://static.usrfiles.com/ugd/850f07_40047a793294485d8726c1acf29b3d1e.pdf
    • https://cdn.shopify.com/s/files/1/0431/4903/3627/files/trabajo_definicion_en_fisica.pdf
    • https://cdn.shopify.com/s/files/1/0430/5849/5639/files/96843042886.pdf
    • https://cdn.shopify.com/s/files/1/0436/8121/8710/files/dadufisusinupodizesiz.pdf
    • https://cdn.shopify.com/s/files/1/0433/1995/1513/files/html_under_construction_page.pdf
    • https://cdn.shopify.com/s/files/1/0435/6174/6595/files/30804252969.pdf
    • https://cdn.shopify.com/s/files/1/0428/9173/9295/files/zigaxatezevewaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/8886/2622/files/applebee_s_menu.pdf
    • https://cdn.shopify.com/s/files/1/0439/4074/1275/files/dulurupipapunogetazukejuv.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000600f.bin
dbd950f5575e218a10576fc935e2c80ad3037a3059cf58752c38c874d096a95c
pdf-font-stream PDF embedded font (sfnt) at offset 0x600F 5260 bytes
font_01_sfnt_off000071fa.bin
faaca9ddb030fa9d7ee85adbe1899767f83b4889228377e221f08c30259ae166
pdf-font-stream PDF embedded font (sfnt) at offset 0x71FA 10524 bytes