Malicious PDF — malware analysis report

Static analysis result for SHA-256 75ec455e8a237f68…

MALICIOUS

PDF

55.5 KB Created: 2020-08-23 22:40:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d9a411fbd939e5e360fe35422438d02 SHA-1: 74f7ba9d4ff2a154e1bc5d3f40fbe1d5cdee3a30 SHA-256: 75ec455e8a237f6865232252211b81a3b2e43b8bfeae658bf14bb15a8273511c
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, including a critical redirector link to `ttraff.cc`. The document body, though heavily obfuscated, contains text suggesting a lure related to "piano sheet music pdf" and includes the malicious URL. The presence of multiple external links and the ML classifier's high confidence indicate a malicious intent to redirect users to potentially harmful content.

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=someone+like+you+piano+sheet+music+pdf
    • http://files.oportunityisknocking.com/uploads/1/3/2/7/132740204/mokogagewutizir_japupitimolugob_jazepedumefuta_mulesagubelek.pdf
    • http://files.lotuspadyoga.com/uploads/1/3/0/9/130969548/acfcef9e5347f.pdf
    • http://tufup.mysideofthecouch.com/uploads/1/3/0/8/130814161/2ced0a0e30822c.pdf
    • http://files.learninginafterschool.org/uploads/1/3/0/7/130738859/wabixepujubafixolaki.pdf
    • http://vobux.imjustkee.com/uploads/1/3/0/8/130874284/9676306.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/8220/3801/files/63825733658.pdf
    • https://cdn.shopify.com/s/files/1/0432/2790/6206/files/ccna_voice_instructor_lab_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/8866/7039/files/1346948606.pdf
    • https://cdn.shopify.com/s/files/1/0435/6859/5112/files/smash_bros_melee_pc_download_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/9649/6544/files/87349739857.pdf
    • https://cdn.shopify.com/s/files/1/0436/8669/0969/files/4645860319.pdf
    • https://cdn.shopify.com/s/files/1/0431/3592/6434/files/22995921362.pdf
    • https://cdn.shopify.com/s/files/1/0438/2726/5693/files/bazuzidixafu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5840/5280/files/46321226838.pdf
    • https://cdn.shopify.com/s/files/1/0431/4690/3701/files/venugujerusefopuza.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000082dc.bin
1ad5e9aa1c83e8748a00d98c04bc2c69779fef8b53e57222406f55bd45cf1dee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82DC 5568 bytes
font_01_sfnt_off000095a8.bin
bdc701b3e2b491c61084721264da29acefe3f988883e1a50ebd279e851d7aab6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95A8 10492 bytes
font_02_sfnt_off0000b9dd.bin
dbe3dd64dc066f428802739f18684eaf08c446fcda8cbe88d420f1ef9ee6b29b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB9DD 16100 bytes

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