Malicious PDF — malware analysis report

Static analysis result for SHA-256 04df30bb0b5c280a…

MALICIOUS

PDF

41.4 KB Created: 2020-08-24 14:16:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 58fd1fd270cbb99949b21f5dcbbc09c4 SHA-1: af0409d226a0bdcb0581aae4a34ed175dad2ae3f SHA-256: 04df30bb0b5c280a067e5f58af6728acb5feda0f938deba1767cf4bc7acdbf76
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded links, with a critical heuristic identifying it as a link farm pointing to a malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure for a shopping list template, which is then linked to the malicious URL. The primary IOC is the redirector URL, which is likely used to funnel victims to further malicious content.

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.cc/pify?keyword=blank+grocery+shopping+list+template
    • http://vigopukog.livewalkpty.com/uploads/1/3/1/4/131454696/1430842.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/8291/4723/files/abstract_nouns_list.pdf
    • https://cdn.shopify.com/s/files/1/0452/3845/2381/files/kirejaxodag.pdf
    • https://cdn.shopify.com/s/files/1/0431/4241/4492/files/78515230997.pdf
    • https://cdn.shopify.com/s/files/1/0437/7421/4306/files/84764095321.pdf
    • https://cdn.shopify.com/s/files/1/0432/7528/8742/files/eritromicina_bula.pdf
    • https://cdn.shopify.com/s/files/1/0447/8546/7558/files/compendio_catecismo_de_la_iglesia_catolica_descargar.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/muzaloxebomasu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7879/4917/files/android_one_moto_x4_review_cnet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058a8.bin
e5dc719f804146200acb8980853c9e6dcffb5bb73ab8dcd8e4517db275a80bf2
pdf-font-stream PDF embedded font (sfnt) at offset 0x58A8 5348 bytes
font_01_sfnt_off00006aa9.bin
45101a273dc277ba63512b1f83bfe2050d2e33e6d26813aa9293f174219851fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AA9 9452 bytes
font_02_sfnt_off00008aec.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x8AEC 4324 bytes