Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd14f7e42e6f3e57…

MALICIOUS

PDF

40.7 KB Created: 2020-08-24 07:04:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2327c824be9b73c5a366206d4e085249 SHA-1: b5302986e98e8be3cdad307446163f81db7e61e8 SHA-256: cd14f7e42e6f3e5752039661be28dda9e0d8417d23ad387f234769f9e4ef0d91
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=fight+club+full+movie++in+tamil'. This URL is presented within the document body, suggesting a social engineering lure to entice users to click. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify. 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.com/pify?keyword=fight+club+full+movie++in+tamil
    • http://files.thebrewnextdoor.com/uploads/1/3/1/8/131856108/wibesenov_ruduzizuvupo_wotubirujirixu_mexozajuzuw.pdf
    • http://nixemuga.mrsbhatt.com/uploads/1/3/1/3/131379803/tetoxeduroda.pdf
    • https://cdn.shopify.com/s/files/1/0437/8374/9781/files/jarudiziwox.pdf
    • https://cdn.shopify.com/s/files/1/0437/8827/1777/files/79274856806.pdf
    • https://cdn.shopify.com/s/files/1/0438/5135/0166/files/denivewanesoxonutedox.pdf
    • https://cdn.shopify.com/s/files/1/0440/8731/2534/files/congenital_heart_disease_definition.pdf
    • https://cdn.shopify.com/s/files/1/0437/1959/0040/files/44737466311.pdf
    • https://cdn.shopify.com/s/files/1/0437/1218/4474/files/kewoverusipira.pdf
    • https://cdn.shopify.com/s/files/1/0435/6096/0159/files/vonejedagagokaloforimuva.pdf
    • https://cdn.shopify.com/s/files/1/0432/6113/2962/files/bevars_telugu_movie_video_songs.pdf
    • https://cdn.shopify.com/s/files/1/0463/4869/7757/files/kaseruworafelivoxakawuma.pdf
    • https://cdn.shopify.com/s/files/1/0432/4291/3955/files/fitness_assessment_form_personal_trainer.pdf
    • https://cdn.shopify.com/s/files/1/0427/4470/9276/files/69020797885.pdf
    • https://cdn.shopify.com/s/files/1/0430/3529/5905/files/siklus_akuntansi_sektor_publik.pdf
    • https://cdn.shopify.com/s/files/1/0432/8131/8056/files/wofuvaxitigixunimomopekex.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_off00005f70.bin
b0a8f1cd51de7d3464c3fb04b65737db34d0c98b4ccb988858497639fc0b91cb
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F70 5176 bytes
font_01_sfnt_off00007107.bin
182febc5a1708ebab4978d49abd4ba9a8fc4ab656af53b1681e62066ccb7ef98
pdf-font-stream PDF embedded font (sfnt) at offset 0x7107 10884 bytes