Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c11bcfd28b0bd3e…

MALICIOUS

PDF

45.1 KB Created: 2020-08-20 08:44:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f7da45ad2d93ad5a9d1e6babb415cff5 SHA-1: c6f88d48814e1e5732e4bbf3f981d5f5aea22d61 SHA-256: 8c11bcfd28b0bd3e10db55315d8227b7fefc0f16adf79258054025d075df9431
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to domains associated with link farms and redirectors, such as 'ttraff.com'. The document body, though heavily obfuscated, contains text related to website templates and the URL 'https://ttraff.com/pify?keyword=website+templates+free++css', indicating a lure to potentially malicious content. The ML classifier strongly supports the malicious verdict.

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=website+templates+free++css
    • http://pudulezuj.graphiclibrary.org/uploads/1/3/1/4/131437318/mevujodufilew_sefevuno_bosubunulun.pdf
    • http://files.sexyandhealthyshop.com/uploads/1/3/1/4/131453302/668df70f63.pdf
    • http://files.p186x.net/uploads/1/3/0/8/130873741/5707402.pdf
    • http://nefunej.greaterhudson.org/uploads/1/3/0/7/130776485/48c6b98586fe3.pdf
    • http://files.abiblo.com/uploads/1/3/1/3/131383467/dc566.pdf
    • https://cdn.shopify.com/s/files/1/0435/4480/5525/files/28311972474.pdf
    • https://cdn.shopify.com/s/files/1/0436/7020/8662/files/69178663982.pdf
    • https://cdn.shopify.com/s/files/1/0435/4516/5976/files/tamil_rowdy_baby_video_songs.pdf
    • https://cdn.shopify.com/s/files/1/0431/2308/1378/files/sonovonabolidiw.pdf
    • https://cdn.shopify.com/s/files/1/0428/1411/1903/files/57981602640.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/kartilya_ng_katipunan_ni_emilio_jacinto.pdf
    • https://cdn.shopify.com/s/files/1/0437/2440/6935/files/5e_barbarian_zealot_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/9050/2042/files/89148165339.pdf
    • https://cdn.shopify.com/s/files/1/0430/5967/5293/files/plant_cell_lab_onion_and_elodea_answers.pdf
    • https://cdn.shopify.com/s/files/1/0435/2730/7416/files/botaderaf.pdf
    • https://cdn.shopify.com/s/files/1/0429/6730/2295/files/cable_cowboy_john_malone.pdf
    • https://cdn.shopify.com/s/files/1/0434/1573/2376/files/92034507002.pdf
    • https://cdn.shopify.com/s/files/1/0431/8996/0865/files/tudigupemu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9982/4032/files/9238210735.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006888.bin
363204a830290ec7e50c332706d4493c930b3fa85985b278f46e674adbcada05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6888 5312 bytes
font_01_sfnt_off00007a7d.bin
7f38c7bd3076d5ec567b373f8788658f617417f44aeaffad1c2d563936ecbb0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A7D 2268 bytes
font_02_sfnt_off0000848d.bin
90165f003d60aa4c6e78a63a975f5c7791d7f9b79ff8d5ebdc90a96b1c0e734e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x848D 10132 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.