Malicious PDF — malware analysis report

Static analysis result for SHA-256 830f7cd9ad1a0405…

MALICIOUS

PDF

49.6 KB Created: 2020-09-01 03:56:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 40b6c541d253668c16e0051e69bf71b4 SHA-1: 52d97235ae51fcbb48b1cb40b225143b446cab9f SHA-256: 830f7cd9ad1a04050ecc953165abb9ba7b12b436fc552b0ced30ef33db781a33
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL and appears to be a lure for 'Marvel heroes full hd wallpaper'. The presence of a PDF link farm heuristic further indicates malicious intent to distribute links. The primary IOC is the malicious redirector URL.

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.com/pify?keyword=marvel+heroes+full+hd+wallpaper
    • https://static.usrfiles.com/ugd/b98abb_7655abff507940b8baa9eab89fb611b8.pdf
    • https://static.usrfiles.com/ugd/76156b_2cfe39d56e21408c9838b9878ebda230.pdf
    • https://static.usrfiles.com/ugd/b8c837_7639605d2e23480d8678cb82f7e0aed6.pdf
    • https://static.usrfiles.com/ugd/29c71c_05378592638b4caa8409c3c513d8e17b.pdf
    • https://cdn.shopify.com/s/files/1/0463/2746/4097/files/acordes_bemoles_guitarra.pdf
    • https://cdn.shopify.com/s/files/1/0428/0477/3031/files/barsat_ki_raat_song.pdf
    • https://cdn.shopify.com/s/files/1/0459/8149/9559/files/kijon.pdf
    • https://cdn.shopify.com/s/files/1/0440/6099/9830/files/guderotozuxisasofole.pdf
    • https://cdn.shopify.com/s/files/1/0427/8334/2748/files/chamak_challo_chel_chabeli_song_320kbps.pdf
    • https://cdn.shopify.com/s/files/1/0428/2541/6860/files/baxukumixowazejogimojoset.pdf
    • https://cdn.shopify.com/s/files/1/0432/9301/6222/files/marvel_future_fight_apk_data_offline.pdf
    • https://cdn.shopify.com/s/files/1/0433/3476/2655/files/dekizivadenizazag.pdf
    • https://cdn.shopify.com/s/files/1/0434/0911/3253/files/crpc_bare_act_2020.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_off00005f79.bin
bcb2724d2c5ac79d77353a874aa937b0c80d237bddeae37d18f428e39e3af836		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F79 5288 bytes
font_01_sfnt_off00007190.bin
8e3a338e31304a2dde89fa3040599ff1acdda7319e3f97db5d6c9349d247f2e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7190 15556 bytes
font_02_sfnt_off0000a238.bin
3f70697d8cfd0b9becff5adcad726f9ffedcc5d773cc6f7abbcc82b2f8034994		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA238 16164 bytes

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