Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb220660fc458481…

MALICIOUS

PDF

41.2 KB Created: 2020-08-12 05:11:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05b22b4b9ab949306550f910c00ed842 SHA-1: c2a25fc829f6432e4bcb9f922ce119e825e41003 SHA-256: bb220660fc458481055d73eeda71e07c8035556538eeadc1d23c96a776b6ea1b
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains references to the redirector URL and other benign-looking PDF links, suggesting a lure to a malicious site. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=structured+cabling+basics+pdf
    • http://files.kjaassociates.com/uploads/1/3/1/3/131380651/pofajuwisafanos_jalisakonifaj.pdf
    • http://files.lightfactorystudio.com/uploads/1/3/2/6/132680901/sagajovero-kodujuninekow-rozumutide.pdf
    • http://xotamif.sarahtorti.com/uploads/1/3/0/7/130775557/1406d832d5a.pdf
    • http://files.inthezonebar.com/uploads/1/3/2/3/132302759/gubanewari_gupuxejosa_guduwo_vudiz.pdf
    • http://files.westboroughasp.org/uploads/1/3/1/6/131606262/8808265.pdf
    • https://cdn.shopify.com/s/files/1/0431/4211/9592/files/87456306150.pdf
    • https://cdn.shopify.com/s/files/1/0428/7738/6918/files/log_and_antilog_table_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/2515/4716/files/69975347037.pdf
    • https://cdn.shopify.com/s/files/1/0429/9204/2137/files/21517150408.pdf
    • https://cdn.shopify.com/s/files/1/0434/8031/8118/files/canning_process_in_food_industry.pdf
    • https://cdn.shopify.com/s/files/1/0444/4323/8567/files/administrao_de_medicamentos_via_parenteral.pdf
    • https://cdn.shopify.com/s/files/1/0437/6153/3085/files/back_to_the_future_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0429/4885/3926/files/wowebol.pdf
    • https://cdn.shopify.com/s/files/1/0438/7930/1275/files/99028257419.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006288.bin
494b498ca1ddaa1dc8a03860d6e701136e742bfd6bd7e715dd483bf31b71d004		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6288 5568 bytes
font_01_sfnt_off00007582.bin
23d4fa2510fbd26a99d2565b88b72b79be7f129df81169a5a177068c5556f2e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7582 10360 bytes

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