Malicious PDF — malware analysis report

Static analysis result for SHA-256 6436e192a9e353ea…

MALICIOUS

PDF

72.3 KB Created: 2020-08-07 06:22:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e201ba0a1c08cb36efbf0b144d0c8708 SHA-1: b484d92e8692c9c6e75f1ee91bed9d247538cea5 SHA-256: 6436e192a9e353eaf52919edef8632771ab86ce3be98bb580e86beac0c3ecdc3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.ru', and another for a PDF link farm. The document body, though heavily obfuscated, contains the same URL. The embedded link object in the PDF also contains a large number of URLs, many of which are benign Shopify links, but the presence of the malicious redirector is a strong indicator of malicious intent. The ML classifier also strongly flagged this PDF as malicious.

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/pify?keyword=asma+fisiopatologia+pdf
    • http://files.kelseyblotter.com/uploads/1/3/2/6/132681488/4997005.pdf
    • http://files.maryfan.com/uploads/1/3/0/7/130740624/wugimegedebopudipana.pdf
    • http://files.mcclainmatthewsinsurance.com/uploads/1/3/1/0/131070207/1b4560553d4229.pdf
    • http://files.rockymountainluxepuffpoodles.com/uploads/1/3/0/8/130874588/tovazuwewaduzez.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/3064/1826/files/2166648246.pdf
    • https://cdn.shopify.com/s/files/1/0429/0658/3203/files/bukotinagoj.pdf
    • https://cdn.shopify.com/s/files/1/0428/7044/0095/files/lipop.pdf
    • https://cdn.shopify.com/s/files/1/0435/2763/5096/files/12170741846.pdf
    • https://cdn.shopify.com/s/files/1/0441/0625/2440/files/flip_for_mac.pdf
    • https://cdn.shopify.com/s/files/1/0432/4697/7179/files/discord_server_setup.pdf
    • https://cdn.shopify.com/s/files/1/0449/3757/6603/files/windows_server_iso.pdf
    • https://cdn.shopify.com/s/files/1/0434/7687/7478/files/pemiboxenorazadeka.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/davunaxejapezuxipuwuwozom.pdf
    • https://cdn.shopify.com/s/files/1/0432/0293/6992/files/64741989288.pdf
    • https://cdn.shopify.com/s/files/1/0431/1095/7210/files/linus.pdf
    • https://cdn.shopify.com/s/files/1/0431/6535/2093/files/lonanagujugaxog.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_off0000d1e5.bin
b4894a667aa09f7f4bf6048c5ab9c44d68898665295fb1bd480b4c3fff51955b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD1E5 4820 bytes
font_01_sfnt_off0000e247.bin
d03b941999c63426809a2183bb61726a916863544b38ac7dd3cca47bf71185f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE247 10604 bytes
font_02_sfnt_off0001064b.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1064B 4324 bytes

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