Malicious PDF — malware analysis report

Static analysis result for SHA-256 05b3faa004a3d200…

MALICIOUS

PDF

50.1 KB Created: 2020-08-18 16:42:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0763557135d8f681aa68e67eb08f3c5a SHA-1: 577f460630f2d0c331a0eaf78e2f71bcbd01d1b8 SHA-256: 05b3faa004a3d2000cc45671a8e3b55cd6f86a212d57a13f8d21e2d5d6f21972
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which are hosted on domains associated with link farms and redirectors. One of the primary links directs to known malicious infrastructure, indicating a likely attempt to redirect users to harmful content. The ML classifier also strongly flagged this PDF as malicious.

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=plural+form+of+word+analysis
    • http://vezapu.custombarrelworks.com/uploads/1/3/1/4/131456267/fogedum_jaforizosegeb.pdf
    • http://labote.blacklght.com/uploads/1/3/0/8/130874683/a88cf54902b260.pdf
    • http://files.kelseyviola.com/uploads/1/3/1/3/131380213/kipibufino_tofago.pdf
    • http://files.realsolutionsidaho.com/uploads/1/3/1/4/131453124/dumemek_sazofalutiduf_katix.pdf
    • http://files.sunsolutionsolar.com/uploads/1/3/1/4/131438260/683057.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/7794/9848/files/e9_88_b4_e8_81_b2_youmaker.pdf
    • https://cdn.shopify.com/s/files/1/0428/3331/3958/files/wazima.pdf
    • https://cdn.shopify.com/s/files/1/0432/9832/4638/files/xewevagig.pdf
    • https://cdn.shopify.com/s/files/1/0430/7091/4717/files/scp_command_mac.pdf
    • https://cdn.shopify.com/s/files/1/0436/6378/6137/files/blest_be_the_tie_that_binds_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0432/5670/9273/files/android_fragment_tutorial_ppt.pdf
    • https://cdn.shopify.com/s/files/1/0439/1947/4856/files/ssb_psychological_test_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/2741/4696/files/92133773347.pdf
    • https://cdn.shopify.com/s/files/1/0430/4932/0610/files/tnt_on_fios.pdf
    • https://cdn.shopify.com/s/files/1/0429/4865/7311/files/nekanapebepujo.pdf
    • https://cdn.shopify.com/s/files/1/0437/6264/7191/files/bureaucratic_leadership.pdf
    • https://cdn.shopify.com/s/files/1/0431/5162/2306/files/dibaxofugufo.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_off00006bdf.bin
7a9565d526e731a8faa0005589e562e0aaaf6910dd7bc1abb725c31f6cc8cddf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BDF 5248 bytes
font_01_sfnt_off00007db1.bin
726a1fed9d37a2a90985d7137c65077e62120a1c1d5970d830bd551d3d646be9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DB1 12288 bytes
font_02_sfnt_off0000a690.bin
73f6f760a67782f27700c3ed047511a210a1e3765a9cc4fd416c63ff6a2522af		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA690 16060 bytes

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