Malicious PDF — malware analysis report

Static analysis result for SHA-256 6df16f65fff73a50…

MALICIOUS

PDF

44.1 KB Created: 2020-08-19 15:07:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5aa6c805f3b3f59c7c1edca576ef8b65 SHA-1: f63caa6c243ba5afced6ed9794db004f5eb67951 SHA-256: 6df16f65fff73a50e4d48873f7b7dad3eb5f1ce405241b369161f28dd8607df2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with at least one identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=videos+website+template', which is flagged as malicious. This suggests the document's primary purpose is to redirect users to malicious sites, likely for phishing or malware delivery.

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=videos+website+template
    • http://jexot.display101.com/uploads/1/3/1/3/131380005/sozimikotufemem_suxabizolepid_funolaseviv_nujuk.pdf
    • http://files.freedompaws.org/uploads/1/3/2/7/132740415/vigapuron.pdf
    • http://files.arttimeinsight.net/uploads/1/3/2/6/132682899/zikud-kevufuzoziji-ragadixomipos.pdf
    • http://files.dfwiscebs.org/uploads/1/3/0/9/130969790/tedusom-kidedezobur-bomovun-jiginudoja.pdf
    • http://files.hourkidsmn.com/uploads/1/3/1/3/131382808/1ca88589.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/7902/5318/files/adverbs_of_time_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/2510/4028/files/99365725309.pdf
    • https://cdn.shopify.com/s/files/1/0432/3403/3824/files/can_i_put_an_animated_gif_in_a.pdf
    • https://cdn.shopify.com/s/files/1/0434/6524/4832/files/xubizobafuwewuzeweviwok.pdf
    • https://cdn.shopify.com/s/files/1/0432/9881/6150/files/degakukob.pdf
    • https://cdn.shopify.com/s/files/1/0437/7473/8586/files/21813428284.pdf
    • https://cdn.shopify.com/s/files/1/0437/4393/6673/files/buzofaza.pdf
    • https://cdn.shopify.com/s/files/1/0439/7685/1614/files/9602539645.pdf
    • https://cdn.shopify.com/s/files/1/0428/0591/9903/files/beginner_s_guide_to_darkbasic_game_programming.pdf
    • https://cdn.shopify.com/s/files/1/0436/7230/5817/files/36775428205.pdf
    • https://cdn.shopify.com/s/files/1/0440/6876/5848/files/51817914710.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_off000061ae.bin
b84162c6233e9d37806415a3b562899d89274feb3b53ec58e3798b399889828e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61AE 4888 bytes
font_01_sfnt_off0000725a.bin
b1bc0928efbfb5194aefe020b5d3ad1c9d1df261871590d78c2d100aa878ca0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x725A 10284 bytes
font_02_sfnt_off00009566.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9566 4324 bytes

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