Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7d6cc775bf4b9f4…

MALICIOUS

PDF

45.7 KB Created: 2020-08-11 23:16:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b23b8dfbd65ac3c4d5a49e1daf557ef6 SHA-1: c5c3ee49093abb29701971c027a7cb2322b29bfc SHA-256: b7d6cc775bf4b9f4af9dd6b97cc44adf723093561f2b73834d98f8d51c1f0222
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.cc) known for malicious activity. The document body, though heavily obfuscated, contains the target URL and related keywords, suggesting a phishing or redirection scheme. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=application+software+meaning+pdf
    • http://files.salvoselfdefense.com/uploads/1/3/1/3/131398598/4175054.pdf
    • http://files.tasteandseebakery.org/uploads/1/3/2/7/132712096/nurodid.pdf
    • http://files.hullabaloomusicfestival.com/uploads/1/3/2/7/132740415/zikomigop.pdf
    • http://darupep.roselleyouthtrack.com/uploads/1/3/0/7/130739038/5065190.pdf
    • https://cdn.shopify.com/s/files/1/0433/8827/2807/files/stick_figure_fight.pdf
    • https://cdn.shopify.com/s/files/1/0439/4627/9080/files/vigunepurul.pdf
    • https://cdn.shopify.com/s/files/1/0438/1566/5826/files/30474742039.pdf
    • https://cdn.shopify.com/s/files/1/0441/4029/8392/files/comment_apprendre_l_anglais_facilement_et_rapidement_gratuitement.pdf
    • https://cdn.shopify.com/s/files/1/0432/4114/4483/files/python_data_structures_and_algorithms_benjamin_baka_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/6238/6079/files/21346258609.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xasojikunu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9521/2697/files/34502611399.pdf
    • https://cdn.shopify.com/s/files/1/0430/0429/7375/files/mumafekibutuxezazasa.pdf
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/35844489142.pdf
    • https://cdn.shopify.com/s/files/1/0434/8359/4909/files/35415017578.pdf
    • https://cdn.shopify.com/s/files/1/0427/9477/8791/files/47910952141.pdf
    • https://cdn.shopify.com/s/files/1/0431/0233/9232/files/mevemuvisatalezimowa.pdf
    • https://cdn.shopify.com/s/files/1/0432/6899/7286/files/autocad_commands_list_with_explanation_in_urdu_free_download.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_off00006739.bin
b1a419661fd0153b5b0c549ef34c40383113918a332ff9a0c45ee3dd849c7a97
pdf-font-stream PDF embedded font (sfnt) at offset 0x6739 5344 bytes
font_01_sfnt_off00007952.bin
4f943bd67f0d03c80bc7640cd893a5794027f1d2503687450c18e6fd7f9f0b25
pdf-font-stream PDF embedded font (sfnt) at offset 0x7952 9972 bytes
font_02_sfnt_off00009b18.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x9B18 4324 bytes