Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e45be07279d527e…

MALICIOUS

PDF

52.9 KB Created: 2020-08-11 13:20:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2bf1bd9ee01c21943202d28bc871d559 SHA-1: bb0f4ae5f29cb03d386f5042f7480266c345adf3 SHA-256: 5e45be07279d527e63031883aa36450874a6a2e17a228ac3a1981d6bbda634b9
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm designed to distribute malicious content. One prominent link redirects to `https://ttraff.cc/pify?keyword=how+to+become+a+good+english+speaker+pdf`, which is flagged as malicious redirector infrastructure. The document body, though partially corrupted, contains text related to becoming an English speaker, likely a lure to encourage clicks on the malicious links.

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=how+to+become+a+good+english+speaker+pdf
    • http://vonoxuwax.manchesterfashionweek.com/uploads/1/3/1/4/131406717/9672326.pdf
    • http://files.kerrybrookfarm.com/uploads/1/3/2/6/132681308/werazoxekowuv_dazamata.pdf
    • http://files.ppmnw.com/uploads/1/3/2/8/132814935/5058284.pdf
    • http://jonaluw.thorbournebaby.com/uploads/1/3/0/8/130813846/jotonejetuvepurila.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/8861/8396/files/remavozepadijibi.pdf
    • https://cdn.shopify.com/s/files/1/0429/9957/8773/files/destinitos_fatales_andres_caicedo.pdf
    • https://cdn.shopify.com/s/files/1/0428/2449/9367/files/1279571436.pdf
    • https://cdn.shopify.com/s/files/1/0434/5135/1207/files/dapipejosak.pdf
    • https://cdn.shopify.com/s/files/1/0431/6394/3074/files/84983934493.pdf
    • https://cdn.shopify.com/s/files/1/0430/3483/7149/files/muzapisolivaxepuzagufegi.pdf
    • https://cdn.shopify.com/s/files/1/0440/2338/2166/files/oracle_pl_sql_interview_questions_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0444/7014/1095/files/aluminum_lithium_alloys_processing_properties_and_applications.pdf
    • https://cdn.shopify.com/s/files/1/0431/5797/9304/files/nupopufagafuv.pdf
    • https://cdn.shopify.com/s/files/1/0435/2881/4741/files/gekufotisonakexo.pdf
    • https://cdn.shopify.com/s/files/1/0427/5470/3526/files/fileruwaxisim.pdf
    • https://cdn.shopify.com/s/files/1/0430/4479/8613/files/pufutit.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000090dd.bin
fa2b92ece7918f57c0248c0630905a03eac51d90021b590b6b1c488fc70ead3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90DD 5828 bytes
font_01_sfnt_off0000a484.bin
1d5ef957eaa09c79b2f48e470b4648f66fdb9145b3c845b5c41210d90177dc55		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA484 10024 bytes

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