Malicious PDF — malware analysis report

Static analysis result for SHA-256 44182f93a2c6b0f8…

MALICIOUS

PDF

50.7 KB Created: 2020-08-24 06:31:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3125d3a2dde68c3b4bf7554e9dfdbf42 SHA-1: 0ab1d7d2dd12146bd1662b00ceb470c14efee5d0 SHA-256: 44182f93a2c6b0f8ac8d3ccb97d071d1acf8b176ac27add505c987cf80c9f4ca
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector infrastructure at `https://ttraff.cc/pify?keyword=adobe+sketch+apk+free`, suggesting an attempt to direct users to malicious content. The document body, though heavily obfuscated, also contains this URL and numerous other links, many hosted on `cdn.shopify.com`, which are likely part of a link farm designed to improve search engine ranking for malicious content. The ML classifier 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=adobe+sketch+apk+free
    • http://files.mrescience.net/uploads/1/3/1/1/131163872/fubaxe.pdf
    • http://tajizo.laurafrasca.com/uploads/1/3/2/8/132816066/4208265.pdf
    • http://mimik.southcalgarymedicalclinic.ca/uploads/1/3/0/9/130968984/139178.pdf
    • http://files.nlpedinburgh.co.uk/uploads/1/3/1/1/131164473/2dd2e6a0638b.pdf
    • https://cdn.shopify.com/s/files/1/0431/0473/1300/files/29980263962.pdf
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/78524215550.pdf
    • https://cdn.shopify.com/s/files/1/0445/6490/6148/files/18_regions_of_the_philippines.pdf
    • https://cdn.shopify.com/s/files/1/0437/8905/8209/files/38628105511.pdf
    • https://cdn.shopify.com/s/files/1/0434/5665/9621/files/basic_english_test_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0437/2522/6133/files/29422846958.pdf
    • https://cdn.shopify.com/s/files/1/0438/7841/6539/files/twenty_eight_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0429/1434/9215/files/xanaro.pdf
    • https://cdn.shopify.com/s/files/1/0434/1451/9966/files/55062571017.pdf
    • https://cdn.shopify.com/s/files/1/0437/5209/5898/files/57547748797.pdf
    • https://cdn.shopify.com/s/files/1/0429/2929/1427/files/basic_programming_language.pdf
    • https://cdn.shopify.com/s/files/1/0432/3062/5950/files/wedipikutajigum.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_off00006819.bin
e5b24813243043d66441b4e44ae77efa7be55acb8bfefbeb3bb16ba6884795ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6819 5404 bytes
font_01_sfnt_off00007a6a.bin
f82e3d3241a52dd598aa1965fc5a3f29a75c1300f3316511cbf81bb3715d9599		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A6A 11388 bytes
font_02_sfnt_off00009a33.bin
2a3f92be174f7a02bf3aa2ac59c22f866e2bdc65def49edf5590acfb715b026d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A33 10360 bytes

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